OpenAI model
GPT 5.2 Codex
GPT 5.2 Codex in the public OpenAI catalog.
- Provider
- OpenAI
- Availability
- Available
- Model ID
- gpt-5.2-codex
- Snapshot
- 2026-10-07
GPT 5.2 Codex Benchmarks & Agentic Accuracy
Verified primary research & developer preference metrics
What This Means in Real Software Development
- 73.5% autonomous SWE-bench score with reduced hallucination in complex asynchronous code.
- Writes idiomatic Go, Rust, and TypeScript with strict adherence to repository linter configurations.
- Operates with responsive execution, maintaining high developer productivity during live agent runs.
- Native support for Swarm Task Program stage barriers and verification handoffs.
Swarm Multi-Agent Topology
Best Paired With: Claude 3.7 Sonnet as Lead Planner
High-fidelity Coder worker for intricate codebases requiring zero build regression.
Executes isolated feature work inside dedicated worktrees with full Git isolation.
What Developers & Practitioners Are Saying
Real-world field observations, production strengths, and developer consensus
"Refined developer-centric Codex engine, optimized for low-latency interactive code editing."
Verified Real-World Strengths
- 73.5% on SWE-bench Verified
- Fast AST traversal and refactoring suggestions
- Superb unit test generation coverage
Production Caveats & Gaps
- Can be aggressive with dependency version upgrades if not constrained
Primary Sources & Methodology Citations
- OpenAI GPT-5.2 Codex Technical Report — OpenAI (December 2025)
GPT 5.2 Codex model overview
GPT 5.2 Codex is listed in the public Swarm catalog through OpenAI. This page summarizes the verified catalog fields used by Swarm without claiming real-time access for every provider account.
- Provider
- OpenAI
- Family
- Gpt 5
- Context window
- 400K tokens
- Thinking support
- Not supported
- Availability status
- Available
- Catalog ID
- openai/gpt-5.2-codex
Run GPT 5.2 Codex in Swarm
Verified CLI workflow & multi-agent architecture
swarm ctl model set --provider openai --model openai/gpt-5.2-codex# Or switch interactively inside the terminal TUI:
/modelsSubagent Role Matrix
Assign GPT 5.2 Codex to specialized system roles in ~/.swarm/config.json:
- Primary / Planner: Orchestrates full task DAGs and multi-stage pipelines.
- Coder Subagent: Generates code and unit tests inside private Git worktrees.
- Finder Subagent: Performs read-only code search, symbol discovery, and mapping.
Public catalog snapshot. Catalog availability is not a real-time provider status or an access guarantee.