<- All Models
GPT-5.3 Codex
Most capable agentic coding model. Combines frontier coding performance of GPT-5.2-Codex with reasoning and professional knowledge of GPT-5.2. ~25% faster.
400K context·$1.75 in·$14.00 out·Feb 2026 release·Vision, Reasoning, Tools / functions, Web search, Image output
Available on
Providers
Where GPT-5.3 Codex runs in Big-AGI, with each service's own model ID and USD-per-1M-token rates. The summary above prefers the creator's claim; rates below are each service's own.
ServiceModel IDContextInputOutputCache read
Run GPT-5.3 Codex in Big-AGI.
Connect your own key on any of the services above, at their rates, no markup - and run it side by side with every other model.
Launch Big-AGIBIG-AGI
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