David Soria Parra @dsp_
Member of Technical Staff @AnthropicAI. Co-Creator of https://t.co/cn31cNYQD3. Ex-Meta. Playing with computers and tech. https://t.co/yDyCddC26H experimentalworks.net London, UK Joined August 2008-
Tweets4K
-
Followers11K
-
Following414
-
Likes4K
FFS Twitter. No matter how much I try to block it. I get right wing bait ads that link to a fake BBC website with very questionable and clearly wrong content about economic data and pro reform stuff. This platform truly is nothing but a right wing outlet at times.
@iliaa I run it with the same Claude code and Cowork harness. What’s your use case ? I do find I very accurate reviewing projects, analyzing standard landscapes, and writing code in complex code bases.
I have been using this model daily. It’s absolutely fantastic. I feel it’s quite a leap in capability.
Introducing Claude Fable 5: a Mythos-class model that we’ve made safe for general use. Its capabilities exceed those of any model we’ve ever made generally available.
This is a super exciting release - Claude Fable 5 is the same underlying model as Mythos but with added safeguards. The benchmarks are great and it's SOTA on everything by a margin but I'll add that *qualitatively* also, this is a major-version-bump-deserving step change forward (imo of the same order as Claude 4.5 was in November), peaking especially for long problem-solving sessions on very difficult problems. You can give it a lot more ambitious tasks than what you're used to, the model "gets it" and it will just go, and it's never felt this tempting to stop looking at the code at all (but don't do this in prod!). The model still has quirks that people will run into and the safeguards are configured to be a little too trigger happy for launch, which can hopefully be tuned over time. I feel a lot of things changing as working software increasingly comes out on a tap. The Jevon's paradox kicks in and I feel my own demand for software growing substantially. You can ask for anything - explainers, visualizers, dashboards, bespoke single-use apps (e.g. a full wandb that is hyper-specific just for your project), you can 10X your test suite, auto-optimize code, run giant research projects with custom HTML for the results, anything! "Free your mind" (Matrix ref). Really looking forward to all the things people build!
Fable 5 is state-of-the-art on nearly all tested benchmarks, with exceptional performance in software engineering, knowledge work, scientific research, and vision. The longer and more complex the task, the larger Fable 5’s lead over our other models.
Introducing Claude Fable 5: a Mythos-class model that we’ve made safe for general use. Its capabilities exceed those of any model we’ve ever made generally available.
We've added an observability dashboard for developers of connectors. Connectors let third-party developers bring their tools and data to Claude via MCP.
Today, Anthropic engineers on average ship 8x as much code per quarter as they did compared to 2021-2025.
@grinich @AcquiredFM @djrosent @gilbert @WorkOS Rip … US centric :)
@RhysSullivan We will. There is an extension for MCP that we work on. Honestly I think it’s a super big unlock.
@rachelnabors I can't put my finger at it, but I think it's prettier than basically all other monospace fonts I have used.
I really like Berkeley Mono. It's hands down still my favorite font.
@thesherlocker @mitsuhiko @Proton_Pass 10 minutes ago. I use proton pass exclusively.
@thesherlocker @mitsuhiko @Proton_Pass I like proton pass , but it’s not a good product. It’s quite awkward to use and way worse in autocomplete than 1pass. I use it, don’t get me wrong, but I wish there was something better with similar privacy guarantees
Grateful to have Caitie be part of the MCP journey. Also, welcome back to posting on here :)
Excited for the upcoming MCP Release! A lot of good changes here to get to a stateless and scalable protocol! Grateful that @dsp_ brought me onboard as a Core Maintainer to help drive some of these changes.
@void_0 Oh we have. We will continue to be surprised by 50C+ torching India, freezing colds during European winters and then be quite surprised how we end up with too little food at our tables in 10 years.
Don’t forget, we aren’t even close to +2C yet but can avoid it anymore.
Today is now the hottest day in May on record for both England and Wales with Kew Gardens provisionally reaching 35.1°C and Cardiff Bute Park reaching 32.9°C 🌡️
"MCP came up in literally every conversation. The companies exposing their product as MCP endpoints are getting pulled into deals they never pitched for. The ones that aren't are becoming invisible to agents. This is the new SEO. If agents can't find you, you don't exist. Building products for agents is the new zeitgeist in general."
I just got back from SF and I FEEL INSPIRED. I spent 5 days with frontier AI model teams, AI startup founders, and 3 billionaires. My takeaways: 1. I had lunch with 3 billionaires. All of them are buying SaaS companies and rebuilding them agent-first. They were deeply
@badlogicgames Agreed. I find it sad that the industry calls this “memory”, whereas it’s effectively still Groundhog Day with an increasingly larger library to sift through every morning. History, or Library or whatever feels like more accurate for what is currently called agentic memory
Jordi Boggiano @seldaek
19K Followers 810 Following Co-Founder of @packagist / #ComposerPHP – Head of Engineering at @TeamupCalendar @seld.be on bsky
Jan Lehnardt is on Ma... @janl
14K Followers 5K Following Find me on Mastodon: https://t.co/q2jWhISmnd or BlueSky: @janl.bsky.narrativ.es Makes @couchdb @pouchdb & #offlinefirst. CEO at @neighbourh00die. He/him.
Lars Strojny @lstrojny
837 Followers 2K Following @[email protected] Short-term pessimist, long-term optimist.
Volker Dusch @__edorian
1K Followers 137 Following 👋 I'm a magic __method(); Well, a Software Engineering and Management Human @[email protected] @edorian.bsky.social
php.net @official_php
109K Followers 38 Following The official Twitter account for http://t.co/S2GoDCz77Z.
Armin Ronacher ⇌ @mitsuhiko
80K Followers 898 Following Creator of Flask. Building at https://t.co/uGuzfu0LKT. Bypassing Permissions. Can hand crank. Husband and father of 3 — “more nuanced in person”
Fabian.html.twig @Fabian_ikono
4K Followers 3K Following He|him, try to be vegan, still learning about LGBTQI+, racial, etc. inequality, @winkelwagen_de @mage_one_com, @mageunconf @scuc_blue @[email protected]
Nils Adermann @naderman
5K Followers 1K Following Co-Founder of @packagist / https://t.co/J7OZsciXbE and Co-Creator of #composerphp - he/him - @[email protected]
Gregoire Pineau @lyrixx
4K Followers 179 Following DevOps @jolicode & @redirectionio ; Core Team @symfony ; Mastodon: https://t.co/HA5Dogndgt
Quyen⚡️ @0xQuyen
54 Followers 230 Following
Hardik Mittal @snookie_thought
55 Followers 1K Following Undergraduate ML researcher @ IIITH | IndiaAI fellow
Alejandro @alexcpat
114 Followers 781 Following
Chakradhaar Viswatmul... @ashwincrv
16 Followers 830 Following
Alex Schmitt @AlexSK_OCC
1 Followers 13 Following
klarname, MSc @klarnameMSc
256 Followers 5K Following
Lark @andimrob
0 Followers 45 Following
Emma offline @u_emma_870
9 Followers 529 Following daydreaming in pastel filter 🌸 mutuals & follow back
Javier Zapata @jzfgo
90 Followers 35 Following Developer, tech lead, recovering designer. 20 years of shipping things. Still learning.
Robocikowo @robocikowo
5 Followers 123 Following
Akshay Walvekar @walvekar_a51120
0 Followers 12 Following
Eric Gleeson @erictgleeson
5 Followers 71 Following Co-Founder @willow_protocol - Verifiable Data for Decentralized Applications
Prasad Shirodkar @PrasadShirodkar
25 Followers 151 Following
Ksenia Zahharenkova @KZahharenkova
0 Followers 4 Following
Juan @jipalenzuela
425 Followers 274 Following
Bobak @BobakDigital
145 Followers 2K Following caught up in the finest shit / vp of product & engineering @GeneralCatalyst / economist, PhD @StanfordGSB
Helio @get_helio
1 Followers 16 Following Helio is a lightweight proxy that sits between any AI agent and the external tools it uses.
Nuwa @Nuwaonline
0 Followers 2K Following
Eliran Levi @eliran_levi1
36 Followers 247 Following Principal Architect @Microsoft. Passionate Tech Lead, Software Engineer & Web enthusiast. Previous: Tech Lead @Verint, consultant #TypeScript #fp #reactjs #js
Sherlock @thesherlocker
474 Followers 539 Following codex creative @OpenAI (opinions are my own, and very temporary. very, very ephemeral.)
Paul DeLucia @paul1delucia
266 Followers 221 Following Founder @willow_protocol - Verifiable Data Infrastructure for Decentralized Applications
Arvin @Arvin_ITBP
43 Followers 1K Following 制造业数字化实践者｜ITBP｜关注流程治理、业财融合与企业系统集成。 把复杂业务翻译成系统语言，把系统能力转化为经营价值。
Saravanar Boopalan @saran_saravanar
18 Followers 230 Following
Ashwath Raj @AshwathRajx
0 Followers 44 Following
Efe Bakir @efbakir
29 Followers 154 Following product designer @colonist msc Digital and Interaction Design @polimi
Outsider18 @Outsider9527
6 Followers 190 Following
Aaron Hayes @OpsAndCoffee
26 Followers 71 Following Most modest man in data design. I know a little bit about a lot of stuff so prepare to be confused on what you read...
Shams Hirji @HirjiShams
63 Followers 691 Following Trial & Appellate Lawyer. Licensed in OH, CA, and NY.
Evgeny Potapov @eapotapov
546 Followers 766 Following Founder @ ApexData. SRE/DevOps expert, software development and engineering manager, and entrepreneur with 15+ years of experience. He/Him
Hongjian Zhou @itsEmZee_
3K Followers 492 Following PhD @UniOfOxford, Clarendon Scholar. I work on AI scientists for medicine and biomedical research. Opinions are my own.
Michal Gronert @MichalGronert
2 Followers 62 Following
Callum Jones @callumj
976 Followers 383 Following
Alextuxur @Alextuxur
4 Followers 736 Following
Marcos Grimm @marcosgrimm
315 Followers 424 Following Husband, Father, Developer, L2 Engineering Support @laravelphp
Dillion @dillionverma
16K Followers 2K Following doing something new :) creator of https://t.co/H845Pb9MPY, 20k+ github stars ex @nvidia @shopify @uwaterloo
Luc Perkins @lucperkins
3K Followers 4K Following @DeterminateSys. Nomad. Co-author, Seven DBs in Seven Weeks (https://t.co/7K3vCAoWU0). PhD @DukePoliSci. #RipCity
Jordi Boggiano @seldaek
19K Followers 810 Following Co-Founder of @packagist / #ComposerPHP – Head of Engineering at @TeamupCalendar @seld.be on bsky
Jan Lehnardt is on Ma... @janl
14K Followers 5K Following Find me on Mastodon: https://t.co/q2jWhISmnd or BlueSky: @janl.bsky.narrativ.es Makes @couchdb @pouchdb & #offlinefirst. CEO at @neighbourh00die. He/him.
Lars Strojny @lstrojny
837 Followers 2K Following @[email protected] Short-term pessimist, long-term optimist.
@[email protected]... @beberlei
8K Followers 2 Following Founder and performance detective at @tideways - hosting @Undercover_PHP podcast. Open-Source contributor @doctrineproject @official_php / @[email protected]
Volker Dusch @__edorian
1K Followers 137 Following 👋 I'm a magic __method(); Well, a Software Engineering and Management Human @[email protected] @edorian.bsky.social
Armin Ronacher ⇌ @mitsuhiko
80K Followers 898 Following Creator of Flask. Building at https://t.co/uGuzfu0LKT. Bypassing Permissions. Can hand crank. Husband and father of 3 — “more nuanced in person”
Mitchell Hashimoto @mitchellh
203K Followers 147 Following Creator of Ghostty. 👻 Prev founded @HashiCorp, created Vagrant, Terraform, Vault, and others.
Nikita Popov @nikita_ppv
20K Followers 72 Following LLVM toolchain engineer at @RedHat. Open source contributor, mainly PHP / LLVM / Rust. Studied computer science and physics at TU Berlin.
- account closed - @neingeist
1K Followers 89 Following zuviele elons, donalds and kanyes hier. 🐘 @[email protected]
Charity Majors @mipsytipsy
81K Followers 588 Following honeycomb, observability, the second edition of "Observability Engineering" is coming out soon. find me on substack, bsky, LI, and occasionally here. 🐝🏳️🌈🦄
Nils Adermann @naderman
5K Followers 1K Following Co-Founder of @packagist / https://t.co/J7OZsciXbE and Co-Creator of #composerphp - he/him - @[email protected]
Peter Yang @petergyang
218K Followers 2K Following Practical AI tutorials and interviews to help busy people become AI builders | Join 150K+ readers at https://t.co/XYKTmGVH14
Jared Palmer @jaredpalmer
103K Followers 2K Following VP Engineering @XBOX Prev: VP CoreAI @Microsoft. VP of AI @Vercel. Creator of @v0 and @aisdk. Founder of @Turborepo (acquired by Vercel)
Jacob @fat
39K Followers 786 Following worst engineer at the company, third coolest… created bootstrap 300 years ago… now building things at the Pierre Computer Company.
N. Taylor Mullen @ntaylormullen
11K Followers 377 Following Google DeepMind | Antigravity SDK | Creator of Gemini CLI | Ex-Microsoft lead for GitHub Copilot VS
Erik Brynjolfsson @erikbryn
232K Followers 5K Following Director @DigEconLab Co-founder, @Workhelix @StanfordHAI @SIEPR @Stanford https://t.co/D2bPyxoFEf
Philippe Aghion @Ph_Aghion
26K Followers 137 Following Professor at College de France, INSEAD and LSE. 2025 Nobel Prize in Economics. Account managed by my students at @cdf1530 to share news, not opinions.
Assaf Elovic @assaf_elovic
4K Followers 201 Following building @oradotai, @tavilyai and https://t.co/iOfJFCdyjF, investing at @sequoia
Nicolay Gerold @nicolaygerold
3K Followers 922 Following member of technical staff @AmpCode xsourcegraph podcast @howaiisbuilt ventures @aisbach
Tom Westgarth @Tom_Westgarth15
5K Followers 6K Following Head of Growth @fractile_ai | ex: AI policy @institutegc, @UKSovereignAI Advisor | Bridging tech and policy worlds @txp_io
Rhys @RhysSullivan
56K Followers 1K Following building https://t.co/gIFOwRUrLU to connect any agent to every tool, API, and service your team uses
Mario Zechner @badlogicgames
53K Followers 1K Following Armin's handler at https://t.co/B05ybKGkzx. Old man yelling at Claudes. https://t.co/Q1wG57v1yc https://t.co/mnOoWUr0TO https://t.co/8i5vIRE0Wn
Clare Liguori @clare_liguori
24K Followers 249 Following Senior Principal Engineer, AWS Agentic AI. Working on @kirodotdev 👻, Strands Agents SDK 🧬, MCP Core Maintainer 🤝
James Ward @JamesWard
19K Followers 3K Following My book: https://t.co/QGevhw6nyE | My podcast: @HappyPathProg | @AWSCloud Agent Experience | @AgenticAIFdn TC | My opinions are mine
Peter Steinberger �... @steipete
540K Followers 2K Following Polyagentmorous ClawFather. Came back from retirement to mess with AI and help a lobster take over the world. @OpenClaw🦞 + @OpenAI
Mike D. @mdolan
1K Followers 1K Following You can find me at @[email protected] or @mdolan.bsky.social
Alex Volkov @altryne
41K Followers 2K Following 🎙️ Host of @thursdai_pod ✨ AI Evangelist with @wandb 🪄🐝 working on @weave_wb (opinions my own)
Tyler Leonhardt - @co... @TylerLeonhardt
5K Followers 1K Following dev on @code team. ☕️ nerd. Words are mine. He/him
Zed @zeddotdev
79K Followers 78 Following A next-generation code editor that enables high-performance collaboration with AI and your team. https://t.co/4Ua0UqLrsv
Sean Strong @sean_t_strong
4K Followers 1 Following Product @AnthropicAI Previously: @PearVC, @Stanford AI, @Apple, 2x @NCAA All-American
Katelyn Lesse @katelyn_lesse
6K Followers 89 Following head of platform @anthropicai. previously @stripe @betterment. lfgm.
Dmitry Lyalin @LyalinDotCom
22K Followers 8K Following New job incoming... @ Google. 26yrs of summoning code • prev: @geminicli, @firebase, @microsoft | 👨👦 Dad 24/7 • 🏯 Sumo fan • 💭 Opinions mine 🇺🇸 🇺🇦
Joran Dirk Greef @jorandirkgreef
10K Followers 2K Following Creator, Founder and CEO of @TigerBeetleDB — the financial transactions database designed to power the next 30 years of transaction processing.
Chris Aniszczyk @cra
19K Followers 3K Following Building a Better World Through Open Collaboration / @CloudNativeFdn @linuxfoundation / Always Paying it Forward
Caitie McCaffrey @caitie
18K Followers 886 Following Software Engineer @Microsoft building Agentic Platforms & Developer Tools. MCP Core Maintainer, AAIF Tech Committee, Formerly @Twitter & 343i / @Halo
Maxime Rivest 🧙... @MaximeRivest
7K Followers 916 Following Searching for the wise way to interact with AI. Experiments are on GitHub Chat bot are likely not it. DSPy is probably onto something, so I contribute to it.
Max Stoiber @mxstbr
52K Followers 374 Following Plugins, Apps, MCPs at @OpenAI. Prev Director of Engineering @Shopify, co-founder and CEO @Stellate (acq. by Shopify), co-creator of styled-components.
Tobin South @TobinSouth
5K Followers 1K Following MCP & stuff @AnthropicAI, Research Fellow @Stanford, and 🇦🇺🏃🕺, prev: PhD @MIT
colinhacks/zod @colinhacks
25K Followers 1K Following building @pullfrogai 🐸 the Zod guy 💎 created zshy, co-created Standard Schema, tRPC 🧙 friendly neighborhood typescript nerd 🦆 prev @ bun, edgedb 💻 mit 🏛️
Peter Alexander @Poita_
378 Followers 473 Following Software Engineer - game dev, systems, VR, AI. Currently @AnthropicAI. MCP core maintainer.
Henry de Zoete @HZoete
5K Followers 4K Following Investment & AI Adviser @ DSIT, Visiting Fellow @ Oxford Martin & Said Business School. Former YC founder, angel investor & No10 Downing Street adviser on AI
Adam Wolff @dmwlff
22K Followers 615 Following Claude Code @AnthropicAI 🤖 Avid cook, dedicated snow person, yoga enthusiast
Felix Rieseberg @felixrieseberg
67K Followers 720 Following Claude Cowork / Code @AnthropicAI, Co-Maintainer https://t.co/g4potti8nq
MCP @buildwithMCP
1 Followers 3 Following
Kenton Varda @KentonVarda
16K Followers 275 Following Tech lead for @Cloudflare Workers, https://t.co/bFUDCZ7BUc, https://t.co/Hjf1slmJqs, https://t.co/oIKxYZA4LW. 🦋 https://t.co/8QKY5gf1BK
kate @whoiskatrin
23K Followers 893 Following building agents and sandboxes @cloudflare, so you don't have to
sunil pai @threepointone
53K Followers 3K Following 🎈 Entscheidungsproblem. https://t.co/DISzWsXdnE forky mcforkface.
Lauren Reeder @laurenmhreeder
6K Followers 817 Following Currently, partner @sequoia. Formerly, product leadership @segment/@twilio, @dormroomfund. Always, curious.
Jesse Lumarie @jesselumarie
148 Followers 588 Following Software Engineer @Figma Formerly @Pinterest @bricklanedotcom @TrunkClubTech @NorthernTrust He/Him.
Matt Carey @mattzcarey
24K Followers 3K Following agents and mcp @cloudflare, former pro windsurfer 🇲🇹🌊 hype @demodaysai @badagentpod.. occasional angel
OpenAI Developers @OpenAIDevs
355K Followers 1 Following Official updates for developers building with Codex & the OpenAI Platform • Service status: https://t.co/kZwnwdYYEq
Talia Goldberg @TaliaGold
18K Followers 2K Following SF by day, NYC by blood, PDX at heart. Partner @BessemerVP
Gleb Lukicov @Gleb_Lukicov
182 Followers 584 Following #MLOps Leader | PhD in Physics | https://t.co/D7FhNPOfZE | https://t.co/bKNs56HKEE
Audrey 🎹 @audreypianist
531 Followers 334 Following International Piano Competition Winner eval, ai infra @Airbnb, CS & Music @UMichYou might like
