GPT-5.5
OpenAIApr 24, 2026N/A
April 2026 generation known for fact-anchored writing and reliable tool calls; still widely embedded in production stacks.
- Status
- Generally available
- License
- Proprietary API
- Context window
- 400K
- Max output
- 128K
- Input · $/M
- $1.25
- Output · $/M
- $10
- Cached input · $/M
- $0.13
- Blended · $/M
- $3.44
- Parameters
- Undisclosed
- Inputs
- Text + images, audio
Benchmarks
This model has no published scores on the benchmarks we track yet. Specs and pricing below the fold are still fully sourced.
Reasoning & knowledge
GPQA Diamond
no public score
MMLU-Pro
no public score
Humanity's Last Exam
no public score
ARC-AGI-2
no public score
Coding
SWE-bench Verified
no public score
SWE-bench Pro
no public score
LiveCodeBench
no public score
Agents & computer use
Terminal-Bench 2
no public score
OSWorld 2.0
no public score
BrowseComp
no public score
Math
AIME 2026
no public score
Known strengths
- Factuality tuning
- Broad ecosystem support