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GPT-5.3 Chat pricing & benchmarks

GPT-5.3 Chat is available from OpenAI at $1.75 per million input tokens and $14.00 per million output tokens ($4.81 blended at 3:1). It accepts up to 128,000 tokens of context. GPT-5.3 Chat is an update to ChatGPT's most-used model that makes everyday conversations smoother, more useful, and more directly helpful. It delivers more accurate answers with better contextualization and significantly...

Pricing

Per million tokens · OpenRouter

Input$1.75

Output$14.00

Blended (3:1)$4.81

Specification

openai/gpt-5.3-chat

Context window128K

Max output16K

ReleasedMar 2026

LicenceProprietary

Modalitiesin:text, in:image, in:file, out:text

No independently-run benchmark scores are published for GPT-5.3 Chat yet. We show nothing rather than reprinting an unverified figure.

Compare GPT-5.3 Chat

GPT-5.3 Chat vs Qwen3.8 Max GPT-5.3 Chat vs DeepSeek V4 Flash 0731 GPT-5.3 Chat vs Claude Opus 5 GPT-5.3 Chat vs Gemini 3.6 Flash GPT-5.3 Chat vs Kimi K3 GPT-5.3 Chat vs Grok 4.5 GPT-5.3 Chat vs Claude Sonnet 5 GPT-5.3 Chat vs GLM 5.2

FAQ

How much does GPT-5.3 Chat cost?

GPT-5.3 Chat costs $1.75 per million input tokens and $14.00 per million output tokens on OpenRouter. At a 3:1 input:output mix that blends to $4.81 per million tokens.

What is GPT-5.3 Chat's context window?

GPT-5.3 Chat accepts up to 128,000 tokens of context, and can generate up to 16,384 output tokens.