GPT-5.2 Codex
- Family
- GPT-5
- Released
- 2025-12-18
- Context
- 400K
- Max output
- 128K
- Architecture
- Decoder Only
- Knowledge cutoff
- 2025-08
- Specialization
- code
- Openness
- Proprietary
- License
- ProprietaryCommercial use: conditional
- Weights
- Not released
- Code
- Unknown
Cheapest of 3 routes · OpenAI API · cache read $0.175
About
GPT-5.2-Codex is OpenAI's agentic coding model built on GPT-5.2, released December 18, 2025. Optimized for long-horizon professional software engineering tasks including large refactors, multi-file changes, and codebase migrations. Features context compaction for handling tasks exceeding a single context window, enhanced vision for interpreting screenshots, diagrams, and UI, and strengthened safeguards for defensive cybersecurity workflows. Available to paid ChatGPT users and via the Responses API.
Providers(3)
Compare all 3Compare API pricing across 3 tracked provider routes for input and output tokens, batch, and cached reads when available.
| Provider | Input / 1M | Output / 1M | Cache | Route |
|---|---|---|---|---|
| OpenAI API | $1.75 | $14.00 | read $0.175 | Serverless |
| OpenRouter | $1.75 | $14.00 | read $0.175 | Serverless |
| Vercel AI Gateway | $1.75 | $14.00 | read $0.175 | Serverless |
Available via routers & gateways(15)
LiteLLM
GatewayOpen-source Python SDK and proxy server that unifies 100+ LLM APIs behind a single OpenAI-compatible interface, with load balancing, cost tracking, and configurable failover.
OpenRouter
HybridUnified hybrid gateway to 400+ models from 60+ providers via a single OpenAI-compatible API, with optional auto-routing that selects the best model per prompt.
Portkey
GatewayProduction AI gateway routing to 1,600+ LLMs with failover, load balancing, semantic caching, and guardrails; Apache 2.0 core is fully self-hostable with the complete feature set.
AIRouter
RouterCommercial LLM router that analyzes incoming requests and routes to the optimal model for cost/quality/latency via a drop-in OpenAI-compatible API, with a privacy-preserving embedding mode that avoids sending prompt content.
Helicone
GatewayObservability-first AI gateway with routing, caching, rate limiting, and request tracing; Apache 2.0 open-source core with a managed hosted tier for logging and analytics.
Kong AI Gateway
GatewayMulti-LLM AI gateway built on Kong Gateway 3.x, adding semantic routing, load balancing, guardrails, and MCP traffic analytics as plugins over Kong's existing API management platform.
Capabilities
Benchmark peer barsfor Coding
Benchmark scores(3)
| Benchmark | Score | Version | Evaluation | Source |
|---|---|---|---|---|
| SWE-bench Verified | 72.8 | SWE-bench Verified; mini-SWE-agent v2.0.0; attempts=1; % resolvedObserved 2026-02-19 | — | Source |
| SWE-bench Pro | 56.4 | SWE-Bench Pro Public; OpenAI launch comparison; GPT-5.2-Codex xhighObserved 2025-12-18 | — | Source |
| Terminal-Bench 2.0 | 64.0 | Terminal-Bench 2.0; OpenAI launch comparison; GPT-5.2-Codex xhighObserved 2025-12-18 | — | Source |
Migration checks
No linked migration route is available for this model yet.
Rankings & picks(1)
Compare GPT-5.2 Codex with other models
Comparison and alternatives
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Cheapest of 3 routes · OpenAI API · cache read $0.175