Muse Spark 1.2
Muse Spark 1.2 is an API-only (closed weights) language model from Meta, released August 5, 2026. The context window is 1M tokens. On the Epoch Capabilities Index it scores 155.0, rank 45 of 256 rated models. API price: $1.25 input / $4.25 output per million tokens.
We're excited to release Muse Code (beta), a terminal coding agent powered by Muse Spark 1.2, our newest model. This marks our next step toward the frontier, with larger and much more capable models on the way.
Check it against your own PC →
Strengths by category
ModelTape's 0–100 fit on Epoch AI benchmark results.
| Category | Score | Based on |
|---|---|---|
| Reasoning | 23.7 | Chess Puzzles, SimpleBench |
| Coding | 50.9 | FrontierSWE, DeepSWE |
Benchmark results
| Benchmark (Epoch AI) | Score |
|---|---|
| SimpleBench | 69.4% |
| SimpleQA Verified | 60.3% |
| DeepSWE | 54.9% |
| ProofBench | 43.0% |
| Chess Puzzles | 23.2% |
| FrontierSWE | 12.0% |
Links
Announcement · Epoch AI benchmarks
Models with a similar score
Gemini 3.8 Flash · Kimi K3 · Gemini 3.7 Flash · Muse Spark 1.3 · GPT-5.4 · Grok 4.6 · Qwen 3.8 Max · Claude Opus 4.7
More from Meta
Muse Ember · Muse Spark Open · Muse Wonder · Muse Wonder Full · Muse Spark 1.3 · Muse Spark 1.3 Contributor · Muse Glimmer · Muse Glimmer 30B assistant