What are the verified coding and reasoning benchmarks for O3 Mini?

O3 Mini achieves SWE-bench Verified: 49.3% (High Reasoning (Baseline)), LiveCodeBench: 69.5%, AIME: 87.3%. Verified sources: OpenAI o3-mini System Card & Announcement (OpenAI).

How do I run O3 Mini with Swarm?

Configure O3 Mini via CLI using: swarm ctl model set --provider openai --model openai/o3-mini, or switch models interactively inside the terminal TUI with /models.

Does Swarm isolate O3 Mini code edits from other agents?

Yes. Swarm provisions isolated Git worktrees for every session and subagent, preventing file race conditions and keeping your main working tree clean until verification passes.

Can O3 Mini be assigned to specific subagent roles?

Yes. In ~/.swarm/config.json, you can configure O3 Mini as Primary/Planner (DAG task decomposition), Coder (implementation in isolated worktrees), or Finder (read-only symbol search).

O3 Mini — Specs, Context & Capabilities

Q: What is the recommended Swarm multi-agent topology for O3 Mini?

Swarm recommends O3 Mini as Coder Subagent (Tier 2: Dedicated Logic & Test Engineer). Excels at writing comprehensive unit test suites and verifying complex boundary conditions before code merges. Perfect for Stage 2 integration barriers in Task Programs. Best paired with: Claude 3.7 Sonnet as Planner or Gemini 3.8 Flash as Finder.

O3 Mini Benchmarks & Agentic Accuracy

Verified primary research & developer preference metrics

Primary Sources Verified

SWE-bench Verified

49.3%

High Reasoning (Baseline)OpenAI Official System Card ↗

LiveCodeBench

69.5%

High ReasoningLiveCodeBench v2 Leaderboard ↗

LMSYS Coding Elo

1360Elo

Coding ArenaLMSYS Arena ↗

AIME 2024 / 2025

87.3%

High Reasoning (Pass@1)OpenAI Technical Announcement ↗

Pricing ($ / 1M tokens)

$1.1/ $4.4

$0.55 cached readStandard API Pricing

What This Means in Real Software Development

Dominates competitive algorithmic problem-solving with 69.5% on LiveCodeBench and 97.9% on MATH-500.
Achieves 49.3% baseline on SWE-bench Verified (jumping to 61%+ under advanced multi-turn agent harnesses).
Supports adjustable reasoning effort (low, medium, high) alongside native tool calling and Structured Outputs.
Priced at $0.14/M input and $4.40/M output, sitting in the sweet spot between lightweight flash models and heavy frontier weights.

Swarm Multi-Agent Topology

Tier 2: Dedicated Logic & Test EngineerRole: Coder Subagent

Best Paired With: Claude 3.7 Sonnet as Planner or Gemini 3.8 Flash as Finder

Excels at writing comprehensive unit test suites and verifying complex boundary conditions before code merges. Perfect for Stage 2 integration barriers in Task Programs.

Git Worktree Isolation Advantage:

Because o3-mini produces highly deterministic logic patches, running it inside isolated Git worktrees guarantees clean test assertion commits with zero branch pollution.

What Developers & Practitioners Are Saying

Real-world field observations, production strengths, and developer consensus

Field Consensus

"The gold standard for developer price-to-performance in reasoning models. Blazingly fast compared to o1, offering frontier STEM deduction at utility rates."

Verified Real-World Strengths

Top-tier LiveCodeBench (52.6%) and AIME (79.2%) for just $1.10/M input
High throughput for a reasoning model
Excellent for isolated algorithmic modules, regex authoring, and SQL tuning

Production Caveats & Gaps

Context window smaller than Gemini (200k vs 1M+)
Can overthink simple string formatting or file listing tasks
Lacks multimodal image inputs

Primary Sources & Methodology Citations

OpenAI o3-mini System Card & Announcement — OpenAI (January 2025)

O3 Mini model overview

O3 Mini 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: O3
Context window: 200K tokens
Thinking support: Not supported
Availability status: Available
Catalog ID: openai/o3-mini

File input
Text input
Text output
Reasoning
Tools
Structured output
JSON
Batch

Run O3 Mini in Swarm

Verified CLI workflow & multi-agent architecture

Quickstart Guide →

bash — swarm run

$swarm ctl model set --provider openai --model openai/o3-mini

# Or switch interactively inside the terminal TUI:

>/models

Subagent Role Matrix

Assign O3 Mini 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.

System Agent Roles →Why Swarm Architecture →