DevPass (LLM Gateway)
Meta released Muse Spark 1.3 on September 3, 2026, positioning it as a drop-in upgrade behind Muse Code, Meta's terminal-based coding agent, and available through the OpenAI SDK-compatible Meta Model API. The model is closed-weights and multimodal, with an advertised context window of about one million tokens. Mark Zuc On Meta's own scorecard (numbers not independently reproduced), Muse Spark 1.3 scores 75.4 on DeepSWE v1.1 — ahead of Claude Opus 5 (74.0) and GPT-5.6 Sol (73.0) — and ties GPT-5.6 Sol at 88.8 on Terminal-Bench 2.1, edging past Opus 5's 86.7; Opus 5 still leads on 7 of 9 published benchmarks. Pricing is split between t