GPT-5.3 — AI Model Review & Pricing
GPT-5.3 is the last GPT-5 point release before the unified GPT-5.4. It improves agentic coding and multi-step tool use, adds file input, and extends the context window to 400K tokens.
Specifications
| Attribute | Value |
|---|---|
| Lab | OpenAI |
| Tags | Intelligent Reasoning Coding Multimodal |
| Release Date | 2026-02 |
| Context Window | 400,000 tokens |
| Input Price / 1M | $11.00 |
| Output Price / 1M | $44.00 |
| Input Modalities | Text, Image, File |
| Output Modalities | Text |
Strengths
- Improved agentic coding
- Reliable multi-step tool use
- 400K context window
- File and image input
Weaknesses
- Creative writing less nuanced than Claude
- High cost for API usage
Best For
- Agentic coding
- Tool calling & agents
- Multimodal analysis
- Structured output pipelines
In Depth: GPT-5.3
Draft layout · copy TKSummary
GPT-5.3 is an AI model from OpenAI ranked #7 of 111 on the LMRank leaderboard.
Released 2026-02. It supports Text, Image, File input and produces Text output, with a context window of 400,000 tokens. Input pricing is $11.00 per 1M tokens and output is $44.00 per 1M tokens on OpenRouter.