Muse Spark 1.2
#121 in Frontier LLMsUnknown · v1.2 · 2× · last seen Aug 12, 2026
18
Momentum
Muse Spark 1.2 is a language model developed by Meta (Meta Superintelligence Labs) focused on coding and agentische workflows, released on August 5, 2026 alongside the coding agent Muse Code. It processes text, image, video/audio, and PDF inputs with a 1-Million-Token context window and achieves 82.9% on Terminal-Bench 2.1, placing it second among compared coding models behind Claude Opus 5. At release, the model was proprietary and accessible only via API; on August 10, 2026, Meta announced plans to open the model weights in the coming weeks, though no specific date or final license has been provided.
Momentum trend
14.05.12.08.
Features
| Key Benchmark (%) | 82.9% on Terminal-Bench 2.1 (Meta-reported) |
| Context Window (Tokens) | 1,048,576 tokens (~1M) |
| License | Proprietary (API-only at launch); Meta announced on Aug 10, 2026 it will open the weights, date/license not yet finalized |
| Multimodality | Input: text, image, video, audio, PDF; Output: text |
| Platform | Muse Code, Meta Model API, OpenRouter |
| Price per 1M Tokens | $1.25 input / $4.25 output (standard tier, unchanged from 1.1) |
| Release Date | August 5, 2026 |