Model Watch · OpenAI
GPT-5.5 Pro
Six times the price of GPT-5.5 for the reasoning-heavy end. Check it actually beats Sol on your evals before you commit a budget to it.
What is GPT-5.5 Pro?
GPT-5.5 Pro is a model from OpenAI, built in the US. It's out, and you can call it today.
When is GPT-5.5 Pro coming?
No date. OpenAI hasn't given one, so we haven't made one up. The mentions further down are where a date would show up first.
What does it cost, and how much context does it hold?
| Lab | OpenAI |
|---|---|
| Built in | US |
| Status | released |
| API model id | gpt-5.5-pro |
| Released | Not yet |
| Context window | 1050K tokens |
| Max output | 128K tokens |
| Input, per 1M tokens | $30.00 |
| Output, per 1M tokens | $180.00 |
List prices per million tokens, read off the lab's own docs. Caching, batching and volume deals all cut the real number, so treat this as the ceiling. Check the source before you budget against it.
At 700 words in and 500 out, twenty times a day, that works out around $89 a month. Put your own numbers in, see every OpenAI price, or put it next to another model.
How does it compare to OpenAI's other models?
| Model | Status | Date | Context | In / 1M | Out / 1M |
|---|---|---|---|---|---|
| GPT-5.5 Pro | released | — | 1050K tokens | $30.00 | $180.00 |
| GPT-6 Astra | released | 3 September 2026 | 1050K tokens | $10.00 | $50.00 |
| GPT-5.6 Terra | released | 9 July 2026 | 1050K tokens | $2.00 | $12.00 |
| GPT-5.6 Sol | released | 9 July 2026 | 1050K tokens | $4.00 | $20.00 |
| GPT-5.6 Luna | released | 9 July 2026 | 1050K tokens | $0.20 | $1.20 |
| GPT-5.5 | released | 23 April 2026 | 1050K tokens | $5.00 | $30.00 |
| GPT-5.4 nano | released | 17 March 2026 | 400K tokens | $0.20 | $1.25 |
| GPT-5.4 Mini | released | 17 March 2026 | 400K tokens | $0.75 | $4.50 |
| GPT-5.4 | released | 5 March 2026 | 1050K tokens | $2.50 | $15.00 |
| GPT-5.3-Codex | released | 5 February 2026 | 400K tokens | $1.75 | $14.00 |
| GPT-5.2 | released | 11 December 2025 | 400K tokens | $1.75 | $14.00 |
| GPT-5.1 | released | 13 November 2025 | 400K tokens | $1.25 | $10.00 |
| GPT-5 | deprecated | 7 August 2025 | 400K tokens | $1.25 | $10.00 |
| o3 | deprecated | 16 April 2025 | 200K tokens | $2.00 | $8.00 |
A dash means the lab hasn't published that number for that model.
Every mention we've logged
Every tracked post, release, changelog entry or incident whose title or summary names GPT-5.5 Pro. Newest first, each one linking to where the lab published it.
Nothing yet. The name hasn't appeared in a tracked source.
GPT-5.5 Pro is part of the GPT-5 family, which is where the point releases sit next to each other.
Keep reading
The release timeline is every model we know about, filterable by lab, country and date. The tracker is the live feed these mentions come from, and Model Watch is the whole catalogue on one page.
More from OpenAI:
- GPT-6 Astra · released
- GPT-5.6 Terra · released
- GPT-5.6 Sol · released
- GPT-5.6 Luna · released
- GPT-5.5 · released
- GPT-5.4 nano · released
- GPT-5.4 Mini · released
- GPT-5.4 · released
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