Anthropic's April-2026 Opus, between 4.6 and 4.8. New tokenizer for improved task performance. $5/$25 per Mtok, full 1M-token context. Fast mode available.
Key specs
| Type | API (hosted) |
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| Parameters | — |
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| Architecture | Introduces a new tokenizer (Opus 4.7 and later) that may use up to 35% more tokens for the same text |
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| Context window | 1000K tokens |
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| Knowledge cutoff | — |
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| Modalities | text, image |
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| Recommended backends | — |
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| Minimum viable rig | — |
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Benchmark scores
| GPQA Diamond | — |
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| SWE-bench Verified | — |
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| AIME | — |
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| MMLU-Pro | — |
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| BFCL v3 (tool use) | — |
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| Composite score | — |
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| Community rating | No reviews yet |
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API pricing (per 1M tokens)
| Provider | Input | Output | Free tier |
|---|
| Anthropic | $5 | $25 | No |