Released 2026-02
Codex 5.3
OpenAI 为代码和终端 agent 专门优化的模型，Codex CLI / GitHub Copilot 背后同款。擅长大型代码库重构、bug 修复、命令行自动化，在 SWE-bench 等编程 benchmark 上领先。
Context window
400K
tokens
Max output
64K
tokens
Input price
$1.57
/ 1M tokens
Output price
$12.60
/ 1M tokens
Core capabilities
Code generation
Function calling
Streaming output
Long context
Tool use
Recommended use cases
Codex CLI / 终端自动化
大型代码库重构
Bug 修复与回归测试
Git 工作流自动化
技术文档生成
CI/CD 脚本编写
Quick start
Replace base_url and api_key below with your own to call Codex 5.3. Fully OpenAI SDK compatible — no other code changes needed.
curl https://api.nodebyt.com/v1/chat/completions \
-H "Content-Type: application/json" \
-H "Authorization: Bearer sk-your-key" \
-d '{
"model": "gpt-5.3-codex",
"messages": [{"role": "user", "content": "Hello"}]
}'Other OpenAI models
FAQ
Q: How is Codex 5.3 priced?
A: Pay per token: $1.57/M input, $12.60/M output. No monthly fee, no minimum spend. Credits never expire.
Q: How do I integrate Codex 5.3? Any code changes?
A: Fully OpenAI-compatible — just swap base_url and api_key. Claude models also support the native Anthropic /v1/messages format. See the code snippets above.
Q: Is Codex 5.3 stable through Nodebyt?
A: All requests go through our API gateway (api.nodebyt.com) with optimized third-party backbone routing. Average latency under 200ms, reliable under any network condition.
Q: What use cases does Codex 5.3 support?
A: Recommended: Codex CLI / 终端自动化、大型代码库重构、Bug 修复与回归测试、Git 工作流自动化、技术文档生成、CI/CD 脚本编写. Compare with other models from the same provider for your specific needs.
Q: Does Codex 5.3 have a free tier?
A: New users get free credits after email verification, ready for immediate API testing. Top up from $10 afterwards, pay as you go.
Get started with Codex 5.3
Free credits on sign-up. Pay as you go. $10 minimum top-up, no expiration.
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