Meta’s Muse Spark has rapidly become one of the most widely used AI code generation models in the world, climbing to the second position on OpenCode Go’s weekly leaderboard after processing over 120 million sessions and 79 trillion developer tokens. The model, which features a 1 million token context window allowing it to work with multiple large codebases simultaneously, has seen rapid development with four versions released between April and September 2026. OpenCode Go, the platform where Muse Spark achieved this ranking, offers a $10-per-month subscription service and ranks models based on actual usage rather than synthetic benchmarks. Standard API pricing stands at $1.25 per million input tokens and $4.25 per million output tokens, while the Contributor tier offers reduced rates of $0.10 and $0.20 per million tokens respectively.
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