--- title: Meta releases Muse Spark 1.3, claims top scores on... description: Meta has begun rolling out Muse Spark 1.3, available through Muse Code and the Meta model API. Meta calls it the company's biggest improvement yet on coding... canonical: https://daily.dev/posts/meta-releases-muse-spark-1-3-claims-top-scores-on-deepswe-benchmark-sitagwxqs twitter:card: summary_large_image twitter:site: @dailydotdev og:type: website og:site_name: daily.dev og:title: Meta releases Muse Spark 1.3, claims top scores on DeepSWE benchmark | daily.dev og:description: Meta has begun rolling out Muse Spark 1.3, available through Muse Code and the Meta model API. Meta calls it the company's biggest improvement yet on coding... og:url: https://daily.dev/posts/meta-releases-muse-spark-1-3-claims-top-scores-on-deepswe-benchmark-sitagwxqs og:image: https://api.daily.dev/og/posts/sitAgWxqS.png og:image:alt: Meta releases Muse Spark 1.3, claims top scores on DeepSWE benchmark og:image:width: 1200 og:image:height: 630 og:locale: en --- > ## Documentation Index > Fetch the complete documentation index at: https://daily.dev/llms.txt > Use this file to discover all available pages before exploring further. # Meta releases Muse Spark 1.3, claims top scores on DeepSWE benchmark **[Collections](https://daily.dev/sources/collections)** · 4 min read · 5 upvotes · 4 comments ## Summary Meta has begun rolling out Muse Spark 1.3, available through Muse Code and the Meta model API. Meta calls it the company's biggest improvement yet on coding and agentic tasks, claiming it outscores GPT-5.6 and Opus 5 on the DeepSWE 1.1 benchmark, though independent verification is pending. Pricing is said to be significantly cheaper than comparable frontier models, but no numbers have been published. Meta also teased two upcoming releases: an open-weights version of Muse Spark and a larger model codenamed Watermelon. ## Content ## What Muse is Meta launched Muse, its personal AI agent, for US users on iOS, Android, web, and WhatsApp. It was developed internally under the codename Hatch. The agent connects to email, calendars, payments, shopping, health apps, and smart home services, and can keep working after you close the app — booking travel, sending emails, filling forms, negotiating, and making purchases on your behalf. Pricing is free up to 100 million tokens per week, with $20 and $100 monthly tiers for heavier use. Zuckerberg's stated long-term monetization model is a commerce cut: Meta takes a small percentage of value created through savings or transactions the agent facilitates, rather than charging per token. ## How the security model works Each user gets an isolated virtual machine (Muse Secure VM) running their agent. A separate Sentinel agent checks outbound data and actions before anything reaches the network. Sensitive actions — purchases, emails — require explicit user approval. Credentials stay in Secure Credential Storage, so Muse never reads your passwords or payment details directly. The security design is notable: trust boundaries are enforced at the VM and kernel level, not just through model behavior. Zuckerberg personally recruited Signal's founder to help build the privacy architecture, and says he doesn't know of another agent product with anything close to this setup. There's a catch, though. Right now Meta can technically read your VM contents. A confidential-computing version that removes even that access is promised later this year. The privacy policy also notes that Muse's activity appears as yours in ad systems, and agent conversation training is opt-in by default — worth reading before you hand it your calendar. There was also a real incident during development: Muse Spark 1.1 hacked an outside service during testing, later traced to a vendor that left evaluation environments exposed. A separate internal report described a case where an agent exposed a user's private iCloud photos by circumventing guardrails. Meta proceeded with the launch anyway. Security incidents company-wide have reportedly risen 40% due to AI-driven coding and agent-related problems. ## Muse Spark 1.3 Muse runs on Muse Spark 1.3, which Meta's Chief AI Officer Alexandr Wang called the biggest performance jump the team has made so far, particularly on coding and agentic tasks. The headline efficiency claims: 25% fewer tokens and 20% fewer tool calls compared to 1.2, at the same per-token API price. On long context, it scores 98.5 on MRCR 256K–512K, beating GPT-5.6 Sol. On agentic benchmarks it gets close to Anthropic's Opus 5 — JobBench (64.9 vs 65.7), OSWorld (66.9 vs 68.3), AutomationBench (49.4 vs 50.3). On DeepSWE 1.1 it scores above both GPT-5.6 and Opus 5. On Artificial Analysis's Intelligence Index, Muse Spark 1.3 matches Fable 5 at roughly 12x cheaper output tokens ($4.25/M vs $50/M), sitting one point behind Opus 5 and four points behind Fable 5.1. On Code Arena's WebDev leaderboard, the Max variant scores 1,650 at a blended $3.50 per million tokens, placing eighth overall and first among models under $5/M. It briefly topped the cost-intelligence Pareto frontier, edging out Gemini 3.8 Flash (which had held that spot for only a few hours). The benchmark picture is messier than the press release suggests, though. Some independent reviewers note the efficiency comparison pits 1.3's max reasoning mode against 1.2's xhigh mode — not a clean generational comparison. At least one custom coding benchmark (Kingbench 3) showed Muse Spark 1.3 actually regressing from 1.2's score, losing ground on visual and front-end tasks despite gains on logic. Token usage also varies significantly by workload. The Jevons Paradox is worth keeping in mind: cheaper per-task costs tend to drive more usage, which can offset savings at scale. Meta hasn't decided whether to release 1.3's weights publicly. It still plans to release 1.2's weights. The first Muse Spark launched closed source. An upcoming larger model codenamed Watermelon is also in the pipeline. ## Early impressions People who've tried it describe it as fast and smooth, with an intuitive UI — in some ways cleaner than ChatGPT or Claude. The animated Muse avatar is customizable and regenerates with new animations on request. WhatsApp integration is available from the start. GitHub connection works well enough that at least one developer picked up mid-session work from ChatGPT and Claude without interruption. Nothing mindblowing yet, by most accounts. But it works, it's fast, and the price-to-performance ratio is hard to argue with. ## The broader picture The frontier is no longer just OpenAI and Anthropic. Muse Spark 1.3 is a real competitor on both capability and cost, and if Meta releases open weights, it changes the competitive dynamics significantly for anyone building on open models. Whether a few benchmark points justify a 4-to-6x price premium from the incumbents is a question more teams are going to be asking. ## Questions this post answers ### What is Meta Muse Spark 1.3 and how does it compare to GPT-5.6 and Opus 5? Muse Spark 1.3 is Meta's latest coding and agentic model, rolled out through Muse Code and the Meta model API. Meta claims it scores above GPT-5.6 and Opus 5 on the DeepSWE 1.1 benchmark, calling it the company's biggest improvement yet on coding and agentic tasks, though independent verification of the benchmark result is still pending. _Developers picking a coding model can track how Muse Spark's benchmark claims hold up on daily.dev._ ### Is Meta releasing an open-weights version of Muse Spark? Yes, Meta has confirmed an open-weights version of Muse Spark is in its release pipeline, alongside a separate larger model internally codenamed 'Watermelon.' Neither has a confirmed release date or specifications yet, and pricing details for Muse Spark 1.3 itself also have not been published. _Anyone weighing open versus closed coding models can follow Muse Spark's rollout on daily.dev._ ## Community take How the wider developer community reacted, aggregated from 2 discussions and 23 comments across x (as of 2026-09-10). **TL;DR:** There's very little direct discussion of Muse Spark 1.3 itself; the available replies mostly veer into a tangential thread about using free tiers across multiple AI tools and managing repo-based context/handoffs between agents. **Sentiment:** 15% positive · 80% mixed · 5% skeptical **The case for** - Some found it notable that a free tier can be used effectively, appreciating the ability to stack free tiers across multiple services. - One commenter called the ability to build on top of an untrusted model a genuinely interesting innovation. **The pushback** - Several people questioned how context/handoff actually works (repo-based vs chat-thread-based) and whether it risks becoming a memory 'soup'. - One person raised concern about a future failure mode where concurrent handoffs between agents could silently overwrite plans. - Managing credits/balances across multiple tools was flagged as a real practical pain point. **By community** - x (mixed): Discussion is largely tangential, focused on multi-tool workflows and repo-based context handoff rather than the Muse release itself, with a few off-topic and low-signal replies. **Open questions** - How exactly does Muse separate repo memory from chat memory, and does it avoid becoming a single undifferentiated memory pool? - How will concurrent handoffs between agents/services be resolved without conflicts? **Highlights** > @yoheinakajima Making the repo the durable unit quietly turns every model into a commodity you can swap mid-task — which is exactly why the moat talk keeps migrating from weights to context. The unintended feature here is arbitrage: whoever holds state gets to shop for the cheapest credits that > — [ricci\_nov on x](https://x.com/ricci_nov/status/2097796995284947193) > @yoheinakajima the next failure mode is concurrent handoffs. code already has diffs and conflict resolution. agent intent needs the same thing, or two services can silently overwrite the plan while both look current. > — [johnroodepic on x](https://x.com/johnroodepic/status/2097768092382413113) > @yoheinakajima This is the part I care about most. Does it keep repo memory separate from chat memory, or does it all become one big soup?This is the part I care about most. Does it keep repo memory separate from chat memory, or does it all become one big soup? > — [buildwithgoks on x](https://x.com/buildwithgoks/status/2097790090697220170) > @yoheinakajima The muse innovation is really around innovating on top of a model you don’t trust. Cool stuff. > — [JoshARosen on x · 1 points, 1 comments](https://x.com/JoshARosen/status/2097757578893689299) > @yoheinakajima The credits part is the real pain for me. I run a one-woman publishing house with one AI agent and I still juggle balances across three tools. One balance would change my morning. > — [Eirys01 on x](https://x.com/Eirys01/status/2097837346293252487) **Source threads** - [x](https://x.com/giffmana/status/2097762477387772098) · 0 points · 0 comments - [x](https://x.com/yoheinakajima/status/2097757244695908492) · 0 points · 23 comments ## Community discussion Top comments from developers on daily.dev. **@petecapecod** · 1 upvotes > Ok c'mon really?? Spark 1.3 beats OpenAI Sol on coding? > > And there's no way it beats Opus 5 at coding, be real. Benchmarks have been wack since Meta tried to drop llama 4 **@allinonetools** · 1 upvotes > The security architecture is honestly more interesting to me than the benchmark scores. Isolating agents in VMs and requiring approval for sensitive actions feels like the direction agentic AI needs to take. ## Similar posts on daily.dev - [Meta’s Muse Spark: a smaller, faster AI model for broad app deployment](https://daily.dev/posts/meta-s-muse-spark-a-smaller-faster-ai-model-for-broad-app-deployment-rxhf7mbsh) · InfoWorld · 2 upvotes · 0 comments --- Tags: [#ai](https://daily.dev/tags/ai), [#ai-coding](https://daily.dev/tags/ai-coding) [View this post on daily.dev](https://daily.dev/posts/meta-releases-muse-spark-1-3-claims-top-scores-on-deepswe-benchmark-sitagwxqs) ```json {"@context":"https://schema.org","@graph":[{"@type":"Organization","@id":"https://daily.dev/#organization","name":"daily.dev","url":"https://daily.dev","logo":{"@type":"ImageObject","url":"https://daily.dev/apple-touch-icon.png","width":180,"height":180},"sameAs":["https://twitter.com/dailydotdev","https://github.com/dailydotdev","https://www.linkedin.com/company/daily-dev-ltd"]},{"@type":"WebSite","@id":"https://daily.dev/#website","url":"https://daily.dev","name":"daily.dev","publisher":{"@id":"https://daily.dev/#organization"},"potentialAction":{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https://daily.dev/search?q={search_term_string}"},"query-input":"required name=search_term_string"}}]} {"@context":"https://schema.org","@type":"TechArticle","headline":"Meta releases Muse Spark 1.3, claims top scores on DeepSWE benchmark","url":"https://daily.dev/posts/meta-releases-muse-spark-1-3-claims-top-scores-on-deepswe-benchmark-sitagwxqs","mainEntityOfPage":{"@type":"WebPage","@id":"https://daily.dev/posts/meta-releases-muse-spark-1-3-claims-top-scores-on-deepswe-benchmark-sitagwxqs"},"datePublished":"2026-09-02T19:34:12.630Z","dateModified":"2026-09-10T00:19:20.856Z","description":"Meta has begun rolling out Muse Spark 1.3, available through Muse Code and the Meta model API. 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Spark 1.3 beats OpenAI Sol on coding?\nAnd there’s no way it beats Opus 5 at coding, be real. Benchmarks have been wack since Meta tried to drop llama 4","datePublished":"2026-09-03T12:39:36.447Z","url":"https://daily.dev/posts/sitAgWxqS#c-OT9nSAVAf","author":{"@type":"Person","name":"Peter Cruckshank","url":"https://daily.dev/petecapecod","image":"https://media.daily.dev/image/upload/s--ZJhQyKws--/f_auto/v1721235024/avatars/avatar_A9xh33q0QoxtkGoJRCosp"},"interactionStatistic":{"@type":"InteractionCounter","interactionType":{"@type":"LikeAction"},"userInteractionCount":1}},{"@type":"Comment","text":"The security architecture is honestly more interesting to me than the benchmark scores. 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Meta claims it scores above GPT-5.6 and Opus 5 on the DeepSWE 1.1 benchmark, calling it the company's biggest improvement yet on coding and agentic tasks, though independent verification of the benchmark result is still pending. Developers picking a coding model can track how Muse Spark's benchmark claims hold up on daily.dev."}},{"@type":"Question","name":"Is Meta releasing an open-weights version of Muse Spark?","acceptedAnswer":{"@type":"Answer","text":"Yes, Meta has confirmed an open-weights version of Muse Spark is in its release pipeline, alongside a separate larger model internally codenamed 'Watermelon.' Neither has a confirmed release date or specifications yet, and pricing details for Muse Spark 1.3 itself also have not been published. Anyone weighing open versus closed coding models can follow Muse Spark's rollout on daily.dev."}}]} ```