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Opus 4.6 is Anthropic’s strongest model for coding and long-running professional tasks. It is built for agents that operate across entire workflows rather than single prompts, making it especially effective for large codebases, complex refactors, and multi-step debugging that unfolds over time. The model shows deeper contextual understanding, stronger problem decomposition, and greater reliability on hard engineering tasks than prior generations. Beyond coding, Opus 4.6 excels at sustained knowledge work. It produces near-production-ready documents, plans, and analyses in a single pass, and maintains coherence across very long outputs and extended sessions. This makes it a strong default for tasks that require persistence, judgment, and follow-through, such as technical design, migration planning, and end-to-end project execution. For users upgrading from earlier Opus versions, see our [official migration guide here](https://openrouter.ai/docs/guides/guides/model-migrations/claude-4-6-opus)
Quality Index
46.5
19th of 444
Top 4%
Coding Index
47.6
9th of 354
Top 3%
Price/1M
$10.00
656th cheapest
3233% above median
Top 97%
Speed
49 tok/s
Top 49%
TTFT
2.10s
Context Window
1.0M
28th largest
Top 11%
Input
$5.00
per 1M tokens
Output
$25.00
per 1M tokens
Blended
$10.00
per 1M tokens
Cheaper than 3% of models. Median price is $0.30/1M tokens.
Daily
$10.00
Monthly
$300.00
49
tokens/sec
Faster than 51% of models
2.10
seconds
Faster than 14% of models
2.10
seconds
Faster than 29% of models
Market Median
45 tok/s
9% faster
Median TTFT
0.42s
402% slower
Throughput/Dollar
5
tok/s per $/1M
Speed Comparison
Context Window
1.0M
tokens
Larger than 89% of models
Max Output
128K
tokens
13% of context