Meta Releases Muse Spark 1.3 – Challenging Leading Coding Models
Meta has launched Muse Spark 1.3, its latest AI model developed by Meta Superintelligence Labs. The model challenges competitors such as Opus 5 and GPT 5.6 Sol on key coding benchmarks.

What happened?
Meta has announced Muse Spark 1.3, the latest update in the model series from Meta Superintelligence Labs. According to the company's own benchmarks, the model outperforms competitors such as Anthropic's Opus 5 and OpenAI's GPT 5.6 Sol on several selected benchmarks for coding, agentic work, and long context, while trailing in other areas. The model is available via the Meta Model API and integrated into the code agent Muse Code.
Key facts
| Modellversion | Muse Spark 1.3 (max) |
|---|---|
| Utvecklare | Meta Superintelligence Labs (MSL) |
| Tillgänglighet | Meta Model API och Muse Code |
”almost too cheap to meter”
Why it matters
The launch marks continued fierce competition in the top tier of large language models. Meta's claim of top-tier results in coding and agentic tasks at a significantly reduced cost places further pressure on commercial players such as OpenAI and Anthropic to lower their API prices and improve performance.
Who is affected?
The news primarily concerns software developers, AI researchers, and companies building agent-based systems or using automated code generation tools. With lower pricing and promised open weights, it could also become a strong alternative for startups and independent developers.
Impact on the EU
Muse Spark 1.3 is available globally via Meta's API and Muse Code. Meta's previous strategy of releasing open weights is also planned for the Muse Spark series, which will provide developers within the EU the opportunity for local execution once the weights are released.
What else you should know
It is worth noting that the performance figures are based on Meta's own published benchmarks. Independent third-party evaluations are expected to be published as developers and researchers test the model against their own test suites.
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