OpenAI
OpenAI o3
Heavyweight reasoning — best math + science, slower per token.
Not currently offered on Token Harbor.
GPT-5.5 is live — same family, currently served and priced.
Browse live modelsModel ID
o3Typechat
Context window200,000 tokens
Maximum output tokens—
Input—
Output—
CapabilitiesReasoning
Modalitiestext