Claude Opus 5.5
Latest Claude OpusClaude model for long-running agentic coding and knowledge work
- Strongest at
- Science Top 1% of the past year's models · 2 of 4 benchmarks
- Price per 1M tokens
- $4 / $20 input / output · Anthropic
- Context window
- 1M tokens in · 128K out
- Since the last one
- 60 days after Claude Opus 5
Capability profile
Scored against 91 models released in the past year. 50 is the average model; further out is better.
Where these scores come from
Each capability combines the published benchmarks listed here, rescaled so 50 is the reference average and 15 points is one standard deviation. A hollow dot rests on a single benchmark.
- Coding FrontierCode, MirrorCode, LiveBench: Coding + Agentic Coding
- Writing EQ-Bench Creative Writing v3, EQ-Bench Longform Writing, Lech Mazur Writing comparison, LiveBench: Instruction Following
- Reading & documents GDP.pdf (Surge AI), Vision Evals: OCR & extraction (low effort), LiveBench: Language + Data Analysis
- Reasoning ARC-AGI-2, Chess Puzzles, Mystery Game Puzzles, LiveBench: Reasoning
- Math OTIS Mock AIME 2024-2025, FrontierMath-Tiers-1-3-v2-Private, FrontierMath-Tier-4-v2-Private, ProofBench, LiveBench: Mathematics
- Science GPQA diamond, Terminal-Bench Science 0.1
- Visual reasoning Vision Evals (low effort), Blueprint-Bench 2, GDP.pdf (Surge AI)
- Computer use Terminal-Bench 4.0, APEX-Agents
Price against capability
The shaded corner holds anything better and cheaper. Prices blend input and output 3 to 1.
Nothing from the past year scores higher on Science for less.
Nothing from the past year scores higher on Coding for less.
2 models from the past year score higher on Writing for less: Kimi K3.1 Pro, Muse Spark 1.3.
3 models from the past year score higher on Reading & documents for less: GPT-6.1 Sol, Gemini 4 Argon, Gemini 3.1 Pro Preview.
3 models from the past year score higher on Reasoning for less: GPT-6.1 Terra, GPT-6.1 Sol, Gemini 4 Argon.
1 model from the past year scores higher on Math for less: GPT-6.1 Sol.
3 models from the past year score higher on Visual reasoning for less: GPT-6.1 Terra, GPT-6.1 Sol, Gemini 4 Argon.
2 models from the past year score higher on Computer use for less: Gemini 4 Argon, Qwen3.8 Max.
Anthropic $4 / $20 · OpenRouter $4 / $20 · Cached input $0.2
Since Claude Opus 5
8 releases in the Claude Opus line.
Epoch benchmark boards
Best result on each board it has run. The tick marks the leader.
12 more boards
Anthropic's past year
12 release days in the past year, about one every 30 days. The next is expected around Nov 12, 2026. Forecasts ↗
Specifications
Specifications and prices from Models.dev; availability and limits may differ by provider. Benchmarks from Epoch AI (CC BY 4.0), LiveBench and the other sources named above.