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Claude Opus 5.5

Anthropic · The dependable frontier workhorse.

Opus 5 is Anthropic's mainline flagship: near-Fable capability on most tasks, materially cheaper, with the same 1M context and agentic pedigree.

Live OpenRouter pricing · capability ratings & benchmarks are indicative

Context window

1M

tokens

Input · $/1M

$4.00

per million tokens

Output · $/1M

$20.00

per million tokens

Vs. cost floor

114×

output cost vs DeepSeek V4.1 Flash

Capability profile

Editorial ratings across six axes (0–100), compiled from publisher reports and public evals — indicative, not measured by TrendNexus.

Benchmark highs

SWE-bench Verified≈81%

top-tier repo engineering

GPQA Diamond≈89%

science reasoning

Terminal-Bench≈60%

autonomous ops tasks

MMLU-Pro≈88%

broad expertise

Where it sits in the field

Output cost per million tokens across all 15 tracked flagships — Claude Opus 5.5 highlighted.

Claude Fable 5.1$50.00GPT-5.5$30.00Claude Opus 5.5$20.00GPT-5.6 Terra Pro$12.00Gemini 3.1 Pro Preview$12.00GPT-6.1 Sol Pro$10.00Claude Sonnet 5.5$10.00Kimi K3$10.00GLM 5.3 Prime$8.80Grok 4.7$6.00Qwen3 Max$6.00Gemini 3.8 Flash$3.75DeepSeek V4 Pro 0423$0.879Llama 4 Maverick$0.652DeepSeek V4.1 Flash$0.175

What it's suited to build

Product classes where this model's profile wins — mockups are illustrative, not model output.

Coding

Engineering copilots

Repo-scale refactoring, review bots, spec-to-PR systems.

Agents

Business-process agents

Document-heavy workflows with judgment calls.

Content

Long-form professional writing

Reports and docs that must hold together over 50+ pages.

Benchmark figures and capability ratings are indicative — compiled from publisher reports and public leaderboards, refreshed editorially, and not independently measured by TrendNexus. Verify against your own evals before procurement decisions. Pricing updates with the daily build.