OpenRouter model
OpenAI: gpt-oss-120b
gpt-oss-120b is an open-weight, 117B-parameter Mixture-of-Experts (MoE) language model from OpenAI designed for high-reasoning, agentic, and general-purpose production use cases. It activates 5.1B parameters per forward pass and is optimized...
- Provider
- OpenRouter
- Availability
- Available
- Model ID
- openai/gpt-oss-120b
- Snapshot
- 2026-10-07
OpenAI: gpt-oss-120b Benchmarks & Agentic Accuracy
Verified primary research & developer preference metrics
What This Means in Real Software Development
- Open-weights frontier architecture capable of running on private enterprise GPU clusters.
- Scores 55.4% on SWE-bench Verified, matching or exceeding many proprietary cloud models.
- Fast inference on modern accelerator hardware (NVIDIA H100/B200).
- 100% private and air-gapped execution for sensitive codebases.
Swarm Multi-Agent Topology
Best Paired With: Claude 3.7 Sonnet as Lead Planner
High code synthesis fidelity for teams requiring on-premise execution with zero external data transfer.
Executes inside local Swarm worktrees via vLLM or local OpenAI-compatible endpoints.
What Developers & Practitioners Are Saying
Real-world field observations, production strengths, and developer consensus
"OpenAI's open-weights enterprise foundation model, offering transparent weights for private cloud and sovereign deployments."
Verified Real-World Strengths
- 55.4% on SWE-bench Verified
- Complete self-hosting capability with full data privacy
- Broad multi-language programming competence
Production Caveats & Gaps
- Requires multi-GPU infrastructure (4x A100/H100) to serve at scale
Primary Sources & Methodology Citations
- OpenAI Open-Weights Models Report — OpenAI (September 2025)
OpenAI: gpt-oss-120b model overview
OpenAI: gpt-oss-120b is listed in the public Swarm catalog through OpenRouter. This page summarizes the verified catalog fields used by Swarm without claiming real-time access for every provider account.
- Provider
- OpenRouter
- Family
- OpenRouter
- Context window
- 131.1K tokens
- Thinking support
- low · medium · high
- Availability status
- Available
- Catalog ID
- openrouter/openai/gpt-oss-120b
Run OpenAI: gpt-oss-120b in Swarm
Verified CLI workflow & multi-agent architecture
swarm ctl model set --provider openrouter --model openrouter/openai/gpt-oss-120b# Or switch interactively inside the terminal TUI:
/modelsSubagent Role Matrix
Assign OpenAI: gpt-oss-120b 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.