Anthropic model
Claude Opus 5.5
Claude Opus 5.5 in the public Anthropic catalog.
- Provider
- Anthropic
- Availability
- Available
- Model ID
- claude-opus-5-5
- Snapshot
- 2026-10-07
Claude Opus 5.5 Benchmarks & Agentic Accuracy
Verified primary research & developer preference metrics
What This Means in Real Software Development
- Sets the highest recorded score on SWE-bench Verified at 79.5% with autonomous test synthesis.
- 92.0% AIME score proves near-perfect multi-step mathematical and formal deduction.
- Remarkable resilience: plans and executes multi-stage engineering milestones across hundreds of commits.
- The premier lead orchestrator for high-stakes mission-critical infrastructure software.
Swarm Multi-Agent Topology
Best Paired With: Gemini 3.8 Flash for high-speed subagent implementation
Unrivaled planning accuracy. Defines Task Program barrier stages that guarantee zero wasted subagent tokens.
Supervises multi-agent worktree execution and verifies integration barriers with formal rigor.
What Developers & Practitioners Are Saying
Real-world field observations, production strengths, and developer consensus
"Flagship autonomous systems architect. Excels at orchestrating complex multi-agent swarms and verifying mission-critical code changes."
Verified Real-World Strengths
- 79.5% SWE-bench Verified with state-of-the-art multi-step planning
- Flawless reasoning on distributed consistency protocols and concurrent code
- Unmatched stability on 200k+ context horizon tasks
Production Caveats & Gaps
- Maximum enterprise pricing tier
- Requires fast subagents (Gemini Flash) for preliminary reconnaissance
Primary Sources & Methodology Citations
- Claude Opus 5 System Milestone — Anthropic (April 2026)
Head-to-Head Frontier Comparisons: Claude Opus 5.5 vs Rivals
Standardized, side-by-side benchmark & economics comparison against peer models
| Model | Role / Tier | SWE-bench | LiveCodeBench | LMSYS Elo | AIME | Input / Output |
|---|---|---|---|---|---|---|
Claude Opus 5.5AnthropicCurrent | Tier 1: Master Principal Architect | 79.5% | 70.2% | 1450 | 92% | $15 / $75 |
xAI Grok 4.20xAI Compare Claude Opus 5.5 vs xAI Grok 4.20 → | Tier 1: Frontier Systems Specialist | 58.5% | 54.2% | 1375 | 76% | $2 / $8 |
OpenAI GPT-6 AstraOpenAI Compare Claude Opus 5.5 vs OpenAI GPT-6 Astra → | Tier 1: Autonomous Chief Architect | 82% | 84.5% | 1470 | 97% | $6 / $24 |
Muse Spark 1.3Meta Compare Claude Opus 5.5 vs Muse Spark 1.3 → | Tier 1: High-Speed Frontier Coder | 74.8% | 66.2% | 1420 | — | $1.2 / $6 |
Claude Fable 5.1Anthropic Compare Claude Opus 5.5 vs Claude Fable 5.1 → | Tier 1: Frontier Agentic Lead | 76.2% | 67.4% | 1435 | — | $6 / $30 |
Claude Opus 5.5 model overview
Claude Opus 5.5 is listed in the public Swarm catalog through Anthropic. This page summarizes the verified catalog fields used by Swarm without claiming real-time access for every provider account.
- Provider
- Anthropic
- Family
- Claude
- Context window
- 1M tokens
- Thinking support
- off · low · medium · high · xhigh
- Availability status
- Available
- Catalog ID
- anthropic/claude-opus-5-5
Run Claude Opus 5.5 in Swarm
Verified CLI workflow & multi-agent architecture
swarm ctl model set --provider anthropic --model anthropic/claude-opus-5-5# Or switch interactively inside the terminal TUI:
/modelsSubagent Role Matrix
Assign Claude Opus 5.5 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.