Anthropic
Claude Opus
Current
5.5
shipped 1mo · 29 Sept 2026
Frontier reasoning model, tuned hard for long agentic coding runs.
Specification
- Current
- 5.5
- Context
- 200K tokens
- Weights
- Closed
- Access
- API, apps, Bedrock, Vertex
Modalities: text, image, tool use
Claude Opus — 6-Axis Capability Radar
HEURISTIC ESTIMATEThese scores are rough estimates from category presets, catalog specs, and keywords in release notes. They are not measured benchmarks or test results. Catalog prices and context windows may refer to a different model variant.
Hover or tap an axis to inspect its estimate
Shipping Cadence & Next Drop Forecast
This is an uncalibrated estimate from limited catalog history. A ratio of 100% means one estimated interval has elapsed; it is not a probability. Next-release dates and versions remain unconfirmed.
105 days
±26d variance43 days
Shipped on 2026-09-293.5 drops/yr
4 observed intervals · limited history2027-01-12
Next version: UnannouncedOptional AI cadence commentary
Summarize the recorded history and its limitations. Future releases remain unconfirmed.
Model Version Capability Delta
AI-synthesized architectural jumps, parameter scaling, and capability shifts across releases.
Ready to analyze Claude Opus v5 vs v5.5
Click Synthesize Diff to analyze latent space adjustments, resolution leaps, parameter shifts, and migration caveats via Gemini 3.8 Flash.
Version history
5 releases tracked
5.5
major29 Sept 2026 · 1moClaude Opus 5.5 takes #1 on frontier reasoning and autonomous software engineering.
- Sets state-of-the-art across SWE-bench Verified and competitive coding benchmarks.
- Native multi-agent orchestration for continuous 24-hour development runs.
Recorded announcementGeneral link · release source needed ↗5
major24 Jul 2026 · 3moOpus 5 lands below Fable 5, at half the price.
- New Opus-tier flagship above Opus 4.8.
- Anthropic positions it near Fable 5's intelligence at $5/Mtok input against Fable 5's $10.
- Fable 5 is the Mythos-class frontier model and shipped six weeks earlier, on 9 June.
- Positioned around sustained multi-hour agentic work.
Recorded announcementSpecific source link · unverified ↗4.8
minor12 Apr 2026 · 7moIncremental bump to the 4-series flagship.
- Coding and tool-use gains over 4.5.
- Same pricing as 4.5.
Date basis unconfirmedSource needed4.5
minor24 Nov 2025 · 11moOpus 4.5 lands with a large price cut.
- Roughly a third of 4.1 pricing.
- Effort control added to the API.
Date basis unconfirmedSource needed4.1
minor5 Aug 2025 · 1yOpus 4.1 refines agentic search and coding.
- Drop-in replacement for Opus 4.
Date basis unconfirmedSource needed