GPT-5.1
Timeline (last 90 days)
Claude Opus 4.5 and GPT-5.1 were released in November 2025, and paired with their respective coding agent frameworks (Claude Code and Codex), they evolved coding agents from frequently error-prone to reliable enough for daily use.
According to actual test data, the Harness framework doubles the overall response speed, and applying it to the previous-generation GPT-5.1 model also improves speed by approximately 60%.
All Facts (2)
According to actual test data, the Harness framework doubles the overall response speed, and applying it to the previous-generation GPT-5.1 model also improves speed by approximately 60%.
50%UnverifiedClaude Opus 4.5 and GPT-5.1 were released in November 2025, and paired with their respective coding agent frameworks (Claude Code and Codex), they evolved coding agents from frequently error-prone to reliable enough for daily use.
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