What happened: Kimi K3 vs GPT-5.6 Sol on DeepSWE: Cost, Coding, and Routing

Kimi K3 costs 64% less than GPT-5.6 Sol per task while winning on multiple attempts, though Sol leads on single-shot coding quality.

Why it matters: Kimi K3 vs GPT-5.6 Sol on DeepSWE: Cost, Coding, and Routing

Teams building coding agents or automation that can retry should evaluate routing between both models to balance cost and coverage.

Kimi K3 takes 4x longer per attempt and fails differently than Sol; routing requires a test suite verifier to escalate intelligently.

In the news

Together AI · Published July 26, 2026 · 3 min read

What happened: Kimi K3 costs 64% less than GPT-5.6 Sol per task while winning on multiple attempts, though Sol leads on single-shot coding quality.
Why it matters: Teams building coding agents or automation that can retry should evaluate routing between both models to balance cost and coverage.
Watch out: Kimi K3 takes 4x longer per attempt and fails differently than Sol; routing requires a test suite verifier to escalate intelligently.

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