Anthropic

Claude Opus 5.5 (High)

Claude Opus 5.5 running at high reasoning effort.

#15released Sep 5, 2026·Proprietary·Not disclosed
textimage1.0M ctxreasoning
Intelligence
82.5 #15
Top 2% tier
Output Speed
74 t/s
TTFT 330 ms · ITL 13.5 ms/tok
Blended price (3:1)
$10 /1M
In $5/M · Out $25/M
Context
1.0M
≈ 2,500 A4 pages · max out 32,768

Quality Domain Radar

6-Axis Frontier Evaluation vs Category Average & Flagship

Claude Opus 5.5 (High)
Claude Mythos Preview (#1)
Average (68)
Coding (75)Mathematics (87.5)Hard Science (GPQA) (78)Agentic & Tool Use (86.5)Knowledge (MMLU) (45)Vision / Multimodal (30)

Radar axes are approximated from category scores where direct benchmark measurements are missing — see Methodology.

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Model Details

Release date
Sep 5, 2026
Parameters
Not disclosed
License
Proprietary
Context Window
1,000,000 tokens
Input Price
$5/M
Output Price
$25/M
Output Speed
74 t/s
Time to First Token
330 ms

Estimated monthly bill

Estimated monthly spend
$0.00
Calculating savings vs GPT-4o...

Cite & embed

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BibTeX
@misc{llmpodium2026claudeopus55high,
  title = {Benchmark Analysis and Intelligence Evaluation of Claude Opus 5.5 (High)},
  author = {LLMPodium Research},
  year = {2026},
  url = {https://llmpodium.com/models/claude-opus-5-5-high}
}

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