GPT-5.5 Pro: release date and what it's for
Released , according to OpenAI's announcement. 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.
- Status
- Live
- Released
- Lab
- OpenAI
- Input
- $30per million tokens
- Output
- $180per million tokens
- Context window
- 1.05Mtokens
- Max output
- 128Ktokens
API model ID: gpt-5.5-pro
What we've written about GPT-5.5 Pro
OpenAI model release dates: o3, GPT-5.5 and GPT-6 Astra, Sol and Luna in order
o3 is from April 2025, and the name Sol now means something different from what it meant in July.
We priced a home LLM rig against a $20 subscription. It breaks even in 23 years.
Every number below is from the labs' own pricing pages and docs, checked on September 5, 2026.
We priced 48 AI models on the same job. The bill ran from 19 cents to $89.
One month of steady use, list prices only, the same words in and the same words out.
How GPT-5.5 Pro compares on price and context
inputoutput
- GPT-5.5 Pro$30 / $180
- GPT-6 Astra$10 / $50
- Claude Fable 5.1$10 / $50
- GPT-6 Sol$2 / $10
- Muse Spark 1.3$1.25 / $4.25
- Gemini 3.8 Flash$0.75 / $3.75
- GPT-6 Luna$0.10 / $0.50
how much it reads at once
- GPT-5.5 Pro1.05M
- GPT-6 Sol1.05M
- GPT-6 Luna1.05M
- GPT-6 Astra1.05M
- Muse Spark 1.31.05M
- Gemini 3.8 Flash1.05M
- Claude Fable 5.11M
Next to the newest OpenAI models and the current model from other labs. Prices are in US dollars per million tokens.
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 use it today.
When did GPT-5.5 Pro come out?
OpenAI released it on April 23, 2026. That date comes from OpenAI's announcement.
More from OpenAI
GPT-6 Sol
- in /1M
- $2
- out /1M
- $10
- context
- 1.05M
GPT-6 Luna
- in /1M
- $0.10
- out /1M
- $0.50
- context
- 1.05M
GPT-6 Astra
- in /1M
- $10
- out /1M
- $50
- context
- 1.05M
GPT-5.6 Sol
- in /1M
- $4
- out /1M
- $20
- context
- 1.05M
GPT-5.6 Luna
- in /1M
- $0.20
- out /1M
- $1.20
- context
- 1.05M
GPT-5.5
- in /1M
- $5
- out /1M
- $30
- context
- 1.05M
GPT-5.4 nano
- in /1M
- $0.20
- out /1M
- $1.25
- context
- 400K
GPT-5.4 Mini
- in /1M
- $0.75
- out /1M
- $4.50
- context
- 400K
More news: OpenAI news and ChatGPT updates
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