OpenAI

GPT 5.3 Codex

Name: GPT 5.3 Codex
Price: 1.4759036144578312 USD
Availability: InStock

GPT 5.3 Codex is openai's coding and software-engineering model with a 400,000-token context window, vision and tool calling, and API streaming support.

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Model details

Model ID: gpt-5.3-codex
Provider: OpenAI
Modality: Text generation
Context window: 400,000 tokens
Input → output: Text / image → text
Released: Feb 5, 2026
Available on AshnaAI: Oct 3, 2026

Where this model fits

Best capabilities

Code generation, repository analysis, and debugging
Multi-step reasoning and complex instruction following
Tool calling and agent workflows
Image and document understanding

Best for

Software engineering, refactoring, testing, and technical investigation
Tasks where response quality matters more than minimum latency
Agents that need to call APIs or execute multi-step workflows

Not ideal for

Ultra-low-cost, latency-sensitive, high-volume classification

Benchmarks

No comparable, source-verified benchmark has been published for this catalog entry yet.