Tuesday, July 7, 2026 · No. 345Prices synced within the hour
All·AI·Model

The AI Model Price Index

Agentic Chat (GPT-5.3 Codex)

by GitLab Duo · family gpt-codex · listed Feb 2026RTV

Coding-optimized GPT model for repository edits, reviews, and agentic software work

Current rates USD per 1M tokens

Inputfree
Outputfree
Cache read—
Cache write—

Against the market

Input price vs. maker flagships ($/1M tokens)
Agentic Chat (GPT-5.3 Codex)Agentic Chat (GPT-5.3 Codex): free per 1M tokensfreeDeepSeek V4 FlashDeepSeek V4 Flash: $0.14 per 1M tokens$0.14Qwen3.7 PlusQwen3.7 Plus: $0.50 per 1M tokens$0.50Grok 4.3Grok 4.3: $1.25 per 1M tokens$1.25Gemini 3.5 FlashGemini 3.5 Flash: $1.50 per 1M tokens$1.50Mistral Medium (latest)Mistral Medium (latest): $1.50 per 1M tokens$1.50Claude Sonnet 5Claude Sonnet 5: $2.00 per 1M tokens$2.00GPT-5.5 ProGPT-5.5 Pro: $30.00 per 1M tokens$30.00
Output price vs. maker flagships ($/1M tokens)
Agentic Chat (GPT-5.3 Codex)Agentic Chat (GPT-5.3 Codex): free per 1M tokensfreeDeepSeek V4 FlashDeepSeek V4 Flash: $0.28 per 1M tokens$0.28Grok 4.3Grok 4.3: $2.50 per 1M tokens$2.50Qwen3.7 PlusQwen3.7 Plus: $3.00 per 1M tokens$3.00Mistral Medium (latest)Mistral Medium (latest): $7.50 per 1M tokens$7.50Gemini 3.5 FlashGemini 3.5 Flash: $9.00 per 1M tokens$9.00Claude Sonnet 5Claude Sonnet 5: $10.00 per 1M tokens$10.00GPT-5.5 ProGPT-5.5 Pro: $180 per 1M tokens$180

On the record

Model id
duo-chat-gpt-5-3-codex
Context window
400K tokens
Max output
128K tokens
Input modalities
text, image, pdf
Output modalities
text
Reasoning
yes
Tool calls
yes
Open weights
no
Knowledge cutoff
Aug 2025
Released
2026-02-05
Last updated
2026-02-05
Provider docs
docs.gitlab.com/user/duo_agent_platform/

Back of the envelope

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