GPT-5.5
openai/gpt-5.5
Default frontier GPT for coding, computer use, research, and knowledge work
Capabilities
ReasoningYes
Tool callingYes
Structured outputYes
TemperatureFixed
AttachmentYes
Open weightsNo
Limits
Context1,050,000 tokens
Max input922,000 tokens
Max output128,000 tokens
Details
Familygpt
Knowledge cutoff2025-12-01
Release date2026-04-23
Last updated2026-04-23
Modalities
Inputtext, image, pdf
Outputtext
Benchmarks
SWE-Bench Pro
58.6
resolve rate
Terminal-Bench
78.2
success rate
SWE-Atlas Codebase QnA
45.43
score
SWE-Atlas Refactoring
44.79
score
SWE-Atlas Test Writing
42.59
score
Artificial Analysis Coding Agent Index
65.3
average pass@1
SWE-Atlas Codebase QnA
80.8
pass@1
SWE-Bench Pro
30.9
pass@1
Terminal-Bench
84.1
pass@1
Artificial Analysis Coding Agent Index
60.4
average pass@1
SWE-Atlas Codebase QnA
79.1
pass@1
SWE-Bench Pro
26.2
pass@1
Terminal-Bench
75.8
pass@1
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Pricing
Cost per 1M tokens
InputN/A
OutputN/A