SWE-1.5
SWE-1.5 is an app-only language model from Cognition, released October 29, 2025. Its makers disclosed about 300B parameters.
Today we’re releasing SWE-1.5, the latest in our family of models optimized for software engineering. It is a frontier-size model with hundreds of billions of parameters that achieves near-SOTA coding performance.
Check it against your own PC →
Lab
Cognition
Released
October 29, 2025
Weights
app-only
Parameters
300B disclosed
Context
–
Price / M tokens
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Epoch ECI
not yet rated
Benchmark results
Epoch AI has not published results for SWE-1.5 yet. New models are usually evaluated within days to weeks.