Muse Spark 1.2
Chat model · Meta ·
Muse Spark 1.2 is a chat model by Meta. In Endless it costs 101.3 credits per 1M input tokens and 344.3 per 1M output tokens, on every plan.
Muse Spark 1.2 is Meta's coding-focused model for long agent workflows, from debugging a large codebase to generating a full project end to end.
- Price
- 101.3 credits per 1M input tokens
- 344.3 credits per 1M output tokens
- Availability
- Available on every plan
- Context window
- 1M tokens
- Inputs
- Text, images
- Outputs
- Text
About Muse Spark 1.2
Muse Spark 1.2 is a coding-focused update to Muse Spark 1.1 from Meta Superintelligence Labs, released in August 2026. It was trained heavily on long-horizon coding tasks across a wider range of environments, which shows in sharper code generation, better debugging of complex issues and a firmer grasp of large codebases. It follows long, detailed instructions more precisely than 1.1 and holds about 1M tokens of context.
It is the model behind Muse Code, Meta's terminal coding agent, and it is built for work that keeps going: generating a whole repository from a spec, refactoring a service end to end, tracking down a bug that crosses many modules, or running an optimization loop with more than a thousand tool calls over a day. For a team, that means handing it a scoped project and reviewing the result.
In Endless chat you can give it a long brief, pasted code or screenshots, then switch to another model in the same workspace to review or rewrite what it produced. Usage draws on the credits your workspace shares.
Best for
- Generating a full project or repository from a written spec
- Debugging issues that cross many files and modules
- Long refactors that need the whole codebase in view
- Agent runs with hundreds of tool calls
Questions about Muse Spark 1.2
- What is Muse Spark 1.2?
- Muse Spark 1.2 is a chat model by Meta.
- Is Muse Spark 1.2 free?
- You can try Muse Spark 1.2 for free. It is on every Endless plan, including Free, which gives you 100 credits when you create a workspace and 50 credits every week. Each run spends credits from that balance.
- How much does Muse Spark 1.2 cost?
- In Endless it costs 101.3 credits per 1M input tokens and 344.3 per 1M output tokens, on every plan.
- How do I use Muse Spark 1.2?
- Start a chat in your Endless workspace and choose Muse Spark 1.2 in the model picker. Endless can also pick the best model for each message on its own.
- What are the alternatives to Muse Spark 1.2?
- Similar models you can use in Endless include GPT-6.1 Sol, Claude Opus 5.5, and Gemini 3.8 Flash. Each one has its own page with its price and plan.
- What changed in Muse Spark 1.2 compared with Muse Spark 1.1?
- Muse Spark 1.2 was trained with far more compute on coding tasks and a wider set of training environments. It writes and debugs code better, understands large codebases more fully and follows complex instructions more precisely.
- What is the relationship between Muse Spark 1.2 and Muse Code?
- Muse Code is Meta's terminal coding agent, and Muse Spark 1.2 is the model that powers it. The two were trained together, so the model is tuned for long sessions with many tool calls.
- Are Muse Spark 1.2 weights open?
- No. Muse Spark 1.2 is a closed model, available through Meta's Model API and in Endless chat.
How to use Muse Spark 1.2 in Endless
- 01
Open a chat
Start a chat in your workspace and choose Muse Spark 1.2 in the model picker.
- 02
Bring your context
Attach files, mention a project with @, or ask it to search the web and social media.
- 03
Turn answers into work
Generate images and video, write documents and save what matters to a project.
Related models
GPT-6.1 Sol
by OpenAI
Near-flagship agentic coding and professional work at lower cost
162 / 810 credits per 1M tokens
Claude Opus 5.5
by Anthropic
Long agentic coding and research work over a 1M-token context
324 / 1620 credits per 1M tokens
Gemini 3.8 Flash
by Google
Agentic coding and multi-step reasoning at Flash speed
121.5 / 607.5 credits per 1M tokens
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