← Timeline · Model Release
GPT-5.5 released
OpenAI's GPT-5.5 reports 82.7% on Terminal-Bench 2.0, a large step for terminal-based agentic work.
What happened and why it matters
GPT-5.5 continued the rapid cadence of frontier releases through 2026, with gains concentrated in agentic coding and long tool-using tasks.
Sources
- GPT-5.5 — Wikipedia Wikipedia · 23 Apr 2026
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