GPT-5.5
OpenAI
Parameters
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Architecture
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Released
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About
No detailed description available for this model.
Benchmark Scores
| Benchmark | Score | Date |
|---|---|---|
|
Humanity's Last Exam
stem_reasoning
|
74.43%
|
17.06.2026 |
|
HLE (with tools)
stem_reasoning
|
73.94%
|
17.06.2026 |
|
CritPt (no tools)
stem_reasoning
|
83.60%
|
17.06.2026 |
|
AIME 26
stem_reasoning
|
98.85%
|
17.06.2026 |
|
HMMT Feb 26
stem_reasoning
|
98.70%
|
17.06.2026 |
|
GPQA Diamond
stem_reasoning
|
98.68%
|
17.06.2026 |
|
SWE-bench Pro
coding_agent
|
73.25%
|
17.06.2026 |
|
NL2Repo
coding_agent
|
62.15%
|
17.06.2026 |
|
DeepSWE 1.1
coding_agent
|
93.66%
|
17.06.2026 |
|
ProgramBench
coding_agent
|
98.40%
|
17.06.2026 |
|
Terminal-Bench 2.1 (Terminus-2)
coding_agent
|
92.92%
|
17.06.2026 |
|
Terminal-Bench 2.1 (Best Reported Harness)
coding_agent
|
100.00%
|
17.06.2026 |
|
PostTrainBench
coding_agent
|
52.22%
|
17.06.2026 |
|
SWE-Marathon
coding_agent
|
22.45%
|
17.06.2026 |
|
MCP-Atlas
general_agent
|
85.77%
|
17.06.2026 |
|
Tool Decathlon
general_agent
|
91.02%
|
17.06.2026 |
|
Kimi Code Bench V2
coding_agent
|
100.00%
|
23.08.2026 |
|
Program Bench
coding_agent
|
100.00%
|
23.08.2026 |
|
MLS-Bench-Lite
coding_agent
|
37.93%
|
23.08.2026 |
|
Kimi Claw 24/7 Bench
agentic
|
100.00%
|
23.08.2026 |
|
MCPMark-Verified
agentic
|
100.00%
|
23.08.2026 |
|
FrontierSWE
coding_agent
|
73.65%
|
17.06.2026 |
|
HMMT Nov 25
stem_reasoning
|
100.00%
|
17.06.2026 |