Is GPT-5.5 out yet?
Yes.
About GPT-5.5
OpenAI's spring 2026 flagship, near the top of the LM Arena board at launch.
How we confirmed it
Released via official access
April 23, 2026 at 12:00 AM UTC
Release timeline
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Benchmarks
Agentic#18
GPT-5.5 · via BenchLM.ai · captured Sep 30, 2026 · source
60.73
FrontierCode Diamond
GPT-5.5 · via Epoch AI · captured Jul 24, 2026 · source
6.3
GDP.pdf
GPT 5.5 (xHigh reasoning) · via Epoch AI · captured Sep 30, 2026 · source
26
LM Arena#28
gpt-5.5 · via LM Arena · 70,635 votes · captured Sep 30, 2026 · source
1476.670706708789
MultimodalGrounded#20
GPT-5.5 · via BenchLM.ai · captured Sep 30, 2026 · source
71.4
Coding#14
GPT-5.5 · via BenchLM.ai · captured Sep 30, 2026 · source
62.83
Knowledge#14
GPT-5.5 · via BenchLM.ai · captured Sep 30, 2026 · source
69.42
InstructionFollowing#7
GPT-5.5 · via BenchLM.ai · captured Sep 30, 2026 · source
91.9
ExploitBench
GPT 5.5 · via Epoch AI · captured Sep 30, 2026 · source
41.8
Reasoning#16
GPT-5.5 · via BenchLM.ai · captured Sep 30, 2026 · source
66.1
Sourced metrics mirrored with attribution - not community sentiment.
Data from BenchLM.ai.
Data from Epoch AI, “AI Benchmarking Hub” (CC BY 4.0).
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Model Pulse
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Community consensus
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Compare GPT-5.5 with another model →
Also waiting on: Claude Fable 5.1, Gemini 3.5 Pro, Claude Mythos 5.1, GPT-6
Comments
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