GPT-5.5
OpenAI · Released Apr 23, 2026
$5
Input price / MTok
#25 of 27$30
Output price / MTok
#25 of 271.0M
Context window
#8 of 2889
Tokens / sec
#14 of 2158.6
SWE-bench Pro
#5 of 993.6
GPQA Diamond
#3 of 1978.7
OSWorld
#4 of 874
MRCR
#4 of 5Summary
GPT-5.5 is a proprietary language model from OpenAI, released on Apr 23, 2026.
At $5 input and $30 output per million tokens, it ranks #25 of 27 for input price, placing it among the higher-priced models tracked here.
Its context window of 1.0M tokens ranks #8 of 28 for context depth in this dataset.
It targets coding, reasoning, agents workloads.
Throughput is measured at 89 tokens per second (ranked #14 of 21 for throughput).
OpenAI's current flagship; GPT-5.5 Instant became ChatGPT's default for free users May 5 2026.
Benchmarks
| Benchmark | Score | Max | % | Rank | Source |
|---|---|---|---|---|---|
| SWE-bench Pro | 58.6 | 100 | 58.6% | #5/9 | OpenAI (self-reported in GPT-5.5 launch,... |
| GPQA Diamond | 93.6 | 100 | 93.6% | #3/19 | OpenAI (self-reported in GPT-5.5 launch,... |
| OSWorld | 78.7 | 100 | 78.7% | #4/8 | OpenAI (self-reported in GPT-5.5 launch,... |
| MRCR | 74 | 100 | 74.0% | #4/5 | OpenAI (self-reported in GPT-5.5 launch,... |
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Speed source: https://artificialanalysis.ai/models/gpt-5-5