Proprietary dense model from Anthropic, the previous flagship before Opus 5. Parameter count is undisclosed. Native 1M-token context. Adaptive thinking with effort levels; strong agentic coding and long-horizon capability.
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Pricing: $5/1M input, $25/1M output.
Agents on Rails benchmark (Aug 2026, Le Mans round). 79.4% accuracy on 63 runs - tied with GLM 5.3 and the fastest model at its score tier (3m 36s median, ~15% of Opus 5’s time). API recall 15.9%, the third-lowest in the field. Superseded by Opus 5 (92.1%) on this board, but the accuracy-per-minute is the best of any model above 79%.
coding
reasoning
agentic
- Context
- 1000k
- License
- proprietary
- Origin
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🇺🇸
USA
- Released
- May 2026
Or run it in the cloud
Live per-provider pricing, throughput and uptime - refreshed 2 months ago via OpenRouter. Click a column to sort.
some pricing may be stale - last verified 2026-08-12
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Provider
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Type
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Input $/M
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Output $/M
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Cache $/M
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Tok/s
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Latency
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Uptime
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Value
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API
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5.00 |
25.00 |
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cheapest
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Default order: throughput among 95%+ uptime providers, then latency; subscriptions last. Sort by any column. Subscription rows show $/mo in the Value column - per-token columns are "-". Affiliate links are marked sponsored / nofollow. Confirm current pricing on the provider's site before committing.
PRICE HISTORY
Inference cost over time
Data accumulates from the first daily sync - longer ranges populate over time. Prices come from OpenRouter snapshots, not a historical API.
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