o3: release date and what it's for
Released , according to OpenAI's announcement. The o-series is being wound down. o3 and o3-pro go on 11 December 2026, o3-mini and o4-mini on 23 October.
- Status
- Deprecated
- Released
- Lab
- OpenAI
- Input
- $2per million tokens
- Output
- $8per million tokens
- Context window
- 200Ktokens
- Max output
- 100Ktokens
API model ID: o3
What we've written about o3
September 23, 2026
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.
How o3 compares on price and context
inputoutput
- GPT-6 Astra$10 / $50
- Claude Fable 5.1$10 / $50
- GPT-6 Sol$2 / $10
- o3$2 / $8
- 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-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
- o3200K
Next to the newest OpenAI models and the current model from other labs. Prices are in US dollars per million tokens.
What is o3?
o3 is a model from OpenAI, built in the US. The lab has put it on the retirement list. Move off it.
When did o3 come out?
OpenAI released it on April 16, 2025. That date comes from OpenAI's announcement.
More from OpenAI
OpenAILive
GPT-6 Sol
- in /1M
- $2
- out /1M
- $10
- context
- 1.05M
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GPT-6 Luna
- in /1M
- $0.10
- out /1M
- $0.50
- context
- 1.05M
OpenAILive
GPT-6 Astra
- in /1M
- $10
- out /1M
- $50
- context
- 1.05M
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GPT-5.6 Sol
- in /1M
- $4
- out /1M
- $20
- context
- 1.05M
OpenAILive
GPT-5.6 Luna
- in /1M
- $0.20
- out /1M
- $1.20
- context
- 1.05M
OpenAILive
GPT-5.5 Pro
- in /1M
- $30
- out /1M
- $180
- context
- 1.05M
OpenAILive
GPT-5.5
- in /1M
- $5
- out /1M
- $30
- context
- 1.05M
OpenAILive
GPT-5.4 nano
- in /1M
- $0.20
- out /1M
- $1.25
- context
- 400K
More news: OpenAI news and ChatGPT updates
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