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GPT-5.5 Pro benchmark, API pricing, and provider data cover 98 API providers, with prices starting at $4.11/M. GPT-5.5 Pro free API options are available from 2 providers.
GPT-5.5 Pro is OpenAI’s high-capability model optimized for deep reasoning and accuracy on complex, high-stakes workloads. It features a 1M+ token context window (922K input, 128K output) with support...
Observed-capability estimates with uncertainty reported separately from independent benchmark families.
Input and output token limits for this model, plus how it ranks on long-context understanding.
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Third-party OpenRouter endpoint data, shown separately from LMSpeed measurements. Some 30-minute live performance fields only appear after syncing with an OpenRouter API key.
| Provider endpoint | Input | Output | 1d uptime | 30m latency | 30m throughput | Context / output |
|---|---|---|---|---|---|---|
OpenAI openai/flex | $15/M | $90/M | 100% | — | — | 1.1M tokens / 128K tokens |
OpenAI openai | $30/M | $180/M | 100% | — | — | 1.1M tokens / 128K tokens |
Compare GPT-5.5 Pro API pricing across 96 providers. Prices range from $4.11/M to $300.00/M. KFCV50 offers the lowest rate at $4.11/M. 2 providers offer free API credits or a free tier.
| Provider | Health | Model Variant | Group | Input ($/M) | Output ($/M) | Speed (t/s) | First token | Audit |
|---|---|---|---|---|---|---|---|---|
L1 100% | gpt-5.5-pro | gpt-openai2 | $90.00/M | $540.00/M | — | — | — | |
L1 100% | gpt-5.5-pro-2026-04-23 | gpt-openai | $120.00/M | $720.00/M | — | — | — | |
兔子API Free | L1 100% | gpt-5.5-pro | 原价分组 | Free | Free | — | — | — |
L1 100% | gpt-5.5-pro | az_stable_high_22 | $4.11/M | $24.66/M | — | — | — | |
L1 100% | gpt-5.5-pro-2026-04-23 | az_stable_high_22 | $4.11/M | $24.66/M | — | — | — | |
L1 100% | gpt-5.5-pro | 官转OpenAI | $24.66/M | $147.95/M | — | — | — | |
L1 100% | gpt-5.5-pro | default | $36.71/M | $220.28/M | — | — | — | |
L1 100% | gpt-5.5-pro-2026-04-23 | default | $36.71/M | $220.28/M | — | — | — | |
L1 100% | gpt-5.5-pro | 官转OpenAI | $22.93/M | $137.59/M | — | — | — | |
L1 100% | gpt-5.5-pro | 官转OpenAI | $22.93/M | $137.59/M | — | — | — | |
L1 99% | gpt-5.5-pro | gpt-vip | $35.96/M | $215.75/M | — | — | — | |
L1 100% | gpt-5.5-pro | 官转OpenAI | $19.73/M | $118.36/M | — | — | — | |
L1 100% | gpt-5.5-pro | default | $28.77/M | $172.60/M | — | — | — | |
L1 100% | gpt-5.5-pro | default | $30.00/M | $180.00/M | — | — | — | |
L1 100% | gpt-5.5-pro | hermes-nous | $30.82/M | $184.93/M | — | — | — | |
L1 100% | gpt-5.5-pro-2026-04-23 | ssvip | $90.00/M Cache read$9.00/M | $540.00/M | — | — | — | |
L1 100% | gpt-5.5-pro | ssvip | $90.00/M Cache read$9.00/M | $540.00/M | — | — | — | |
L1 100% | openai/gpt-5.5-pro | default | $60.00/M | $60.00/M | — | — | — | |
L1 99% | gpt-5.5-pro | Enterprise | $16.44/M | $98.63/M | — | — | — | |
L1 98% | gpt-5.5-pro | ssvip | $12.33/M Cache read$1.23/M | $73.97/M | — | — | — |
