Composer 2
Composer 2 is an API-only (closed weights) language model from Cursor, released March 19, 2026. Its makers disclosed about 1T parameters.
Composer 2 is a specialized model designed for agentic software engineering. The model demonstrates strong long-term planning and coding intelligence while maintaining the ability to efficiently solve problems for interactive use.
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Lab
Cursor
Released
March 19, 2026
Weights
API-only (closed weights)
Parameters
1T disclosed
Context
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Price / M tokens
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Epoch ECI
not yet rated
Benchmark results
Epoch AI has not published results for Composer 2 yet. New models are usually evaluated within days to weeks.