Vikas Yadav

Research @Meta TBD Lab
Prev reasoning LLMs at @GoogleDeepMind

[DHH @dhh]

I had Muse Code convert a TanStack version of our new site to Astro. It did a flawless job. And all I managed to spend was 20 cents!! I think maybe this token stash from @finkd and @AIatMeta is going to last longer than the sun has gas left to shine 🌅

[Lisan al Gaib @scaling01]

they actually give you the model almost for free if you allow them to train on your data

[Mark Zuckerberg @finkd]

Releasing Muse Code in beta today. It's a terminal coding agent that takes on complete software engineering tasks across large repos: planning changes, writing code, validating the results. Powered by Muse Spark 1.2, a coding-focused model update.

[Alexandr Wang @alexandr_wang]

muse code in beta is live. first coding agent from msl, built on muse spark 1.2.

install: curl -fsS https://t.co/TFXsXfJKW8 | bash

here's what you should know:

[Mercor @mercor]

Muse Spark 1.1 debuts at #6 overall on APEX-Agents.

Pass@1: 37.1%
Mean criteria passed: 52.0%

For nearly 10% of tasks, Muse Spark 1.1 introduced model failures before trajectory completion. Those tasks automatically received a 0-score on APEX-Agents.

Meta’s aggressive content filtering holds the model back from scoring higher. When you discount these affected agent trajectories, the pass rate for Muse Spark 1.1 increases to 41.4%, placing it ahead of GPT-5.6 Sol.

This is a strong debut on APEX-Agents, our benchmark built for long-horizon tasks in real banking, law, and consulting work.

Congrats to @AIatMeta.

[Vikas Yadav @vy007vikas]

@RylanSchaeffer @Meta All the best Rylan!

[Mark Zuckerberg @finkd]

(1) Today we're releasing Muse Spark 1.1 -- a strong agentic and coding model at a very low price. It's available through our new Meta Model API and in Meta AI.

[Arena.ai @arena]

Exciting news: Meta’s Muse Image just claimed #2 in the Image Arena!

Muse Image from @AIatMeta now ranks second only to OpenAI's GPT Image 2, outperforming Nano Banana, Grok Imagine, MAI Image, and many other leading image models.

It holds #2 across the board: Text-to-Image, Single-Image Edit, and Multi-Image Edit. Congrats to the Meta team on this incredible milestone!

[Alexandr Wang @alexandr_wang]

1/ today we're releasing muse spark, the first model from MSL. nine months ago we rebuilt our ai stack from scratch. new infrastructure, new architecture, new data pipelines. muse spark is the result of that work, and now it powers meta ai. 🧵

[Artificial Analysis @ArtificialAnlys]

Meta is back! Muse Spark scores 52 on the Artificial Analysis Intelligence Index, behind only Gemini 3.1 Pro, GPT-5.4, and Claude Opus 4.6. Muse Spark is the first new release since Llama 4 in April 2025 and also Meta's first release that is not open weights

Muse Spark is a new model from @Meta evaluated on Artificial Analysis. We were given early access by Meta to independently benchmark the model. It is the first frontier-class model from Meta since Llama 4 Maverick was released in April 2025, and notably the first @AIatMeta model that is not being released as open weights. The release follows Meta's reorganization of its AI efforts under Meta Superintelligence Labs, and signals that Meta is re-entering the frontier race after roughly a year of relative quiet.

For context, Llama 4 Maverick and Scout scored 18 and 13 respectively on the Artificial Analysis Intelligence Index as non-reasoning models at the time of their release, while Muse Spark scores 52. Muse Spark essentially closes the gap between to the frontier in a single release.

The model is not open source and is not yet accessible via an API but Meta has shared they expect this to come soon. Meta is also integrating Muse Spark into their first party products including their Meta AI chat product, Facebook, Instagram and Threads.

Key takeaways from our benchmarks:
➤ Muse Spark scores 52 on the Artificial Analysis Intelligence Index, placing it within the top 5 models we have benchmarked. It sits ahead of Claude Sonnet 4.6, GLM-5.1, MiniMax-M2.7, Grok 4.20 and behind Gemini 3.1 Pro Preview, GPT-5.4 and Claude Opus 4.6

➤ Muse Spark is notably token efficient for its intelligence level. It used 58M output tokens to run the Intelligence Index, comparable to Gemini 3.1 Pro Preview (57M) and notably lower than Claude Opus 4.6 (Adaptive Reasoning, max effort, 157M), GPT-5.4 (xhigh, 120M) and GLM-5 (110M)

➤ Muse Spark is the second-most capable vision model we have benchmarked. It scores 80.5% on MMMU-Pro, behind only Gemini 3.1 Pro Preview (82.4%)

➤ Muse Spark performs strongly on reasoning and instruction-following evaluations. It scores 39.9% on HLE, trailing only Gemini 3.1 Pro Preview (44.7%) and GPT-5.4 (xhigh, 41.6%). The model also achieved 5th highest in CritPT with a score of 11%, an eval that is focused on difficult physics research questions. This is substantially above above Gemini 3 Flash (9%) and Claude 4.6 Sonnet (3%)

➤ Agentic performance does not stand out. On GDPval-AA, our evalaution focused on real world work tasks, Muse Spark scores 1427, behind both Claude Sonnet 4.6 at 1648 and GPT-5.4 at 1676, but ahead of Gemini 3.1 Pro Preview at 1320. On On TerminalBench Hard, Muse Spark trails Claude Sonnet 4.6, GPT-5.4, and Gemini 3.1 Pro. Muse Spark joins others in achieving a high τ²-Bench Telecom score of 92%

Key model details:
➤ Modalities: Multimodal including text and vision input, text output
➤ License: Proprietary, Meta's first frontier model not released as open weights
➤ Availability: No public API at the time of publishing. Meta expects to provide API access soon. Meta has started integration into their first party AI offering Meta AI and inside Facebook, Instagram, and Threads

[Elon Musk @elonmusk]

@HandleOfRy Don’t know Ghislaine at all. She photobombed me once at a Vanity Fair party several years ago. Real question is why VF invited her in the first place 🤔

[Tim @trouble_man90]

If THIS is what they decided to release, the still unreleased files must contain cosmic levels of horror and evil. Wow

[James Dyett @dyett]

There is far more outrage from tech leaders over a wealth tax than masked ICE agents terrorizing communities and executing civilians in the streets.

Tells you what you need to know about the values of our industry.

[Paul Graham @paulg]

@ArmandDoma It's not how stupid they think we are. It's how stupid they think their base is. And that I suspect is *very* stupid.

[Bojan Tunguz @tunguz]

Stalinesque levels of gaslighting.

[Jeff Dean @JeffDean]

This is absolutely shameful. Agents of a federal agency unnecessarily escalating, and then executing a defenseless citizen whose offense appears to be using his cell phone camera. Every person regardless of political affiliation should be denouncing this.

[Ted Lieu @tedlieu]

Dear @Sec_Noem: What is the reason Border Patrol attacked this person who was filming them at a gas station in St. Paul?

[Vikas Yadav @vy007vikas]

@khoomeik Without any information about the size/flops of both the models, how's this meaningful?

[Sundar Pichai @sundarpichai]

Our latest Gemini 2.5 Pro update is now in preview.

It’s better at coding, reasoning, science + math, shows improved performance across key benchmarks (AIDER Polyglot, GPQA, HLE to name a few), and leads @lmarena_ai with a 24pt Elo score jump since the previous version.

We also heard your feedback and made improvements to style and the structure of responses. Try it in AI Studio, Vertex AI, and @Geminiapp. GA coming soon!

[Arena.ai @arena]

🚨Breaking: @GoogleDeepMind’s latest Gemini-2.5-Pro is now ranked #1 across all LMArena leaderboards 🏆

Highlights:
- #1 in all text arenas (Coding, Style Control, Creative Writing, etc)
- #1 on the Vision leaderboard with a ~70 pts lead!
- #1 on WebDev Arena, surpassing Claude for the first time

This is the first-ever sweep across text, vision, and WebDev by any model!🥇

Huge congrats to @GoogleDeepMind on this incredible breakthrough!