MiscSubjects

Anthropic: Claude Opus 4.8

Claude Opus 4.8 is Anthropic's most capable generally available model in the Opus family.

AnthropicClaude Opus 4.8
anthropic/claude-opus-4.8
2026-05-27text+image+file->textreasoning: max / xhigh / high / medium / low / none
Coding index
74.3
Artificial Analysis
Agentic index
41.9
Artificial Analysis
Design Arena
1294 Elo · #1
agenticslides · 64.8% wins
Input
$5
per 1M tokens
Output
$25
per 1M tokens
Cached input
$0.50
per 1M tokens
Context
1M
tokens it reads
Max output
128K
tokens it writes
Claude Opus 4.8 is Anthropic's most capable generally available model in the Opus family. It supports text, image, and file inputs with text output, with reasoning support and a 1M-token...
inspect — the catalog entry
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        "elo": 1219,
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        "rank": 16
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  }
}
References (1)
  1. Stored model catalog — Nov 5, 2026
Via
OpenRouter
Id
openrouter/anthropic/claude-opus-4.8
Model id
anthropic/claude-opus-4.8
Name
Anthropic: Claude Opus 4.8
Description
Claude Opus 4.8 is Anthropic's most capable generally available model in the Opus family.
Family
anthropic
Canonical slug
anthropic/claude-4.8-opus-20260528
Price in
5
Price out
25
Price cache read
0.5
Price cache write
6.25
Price cache write 1h
10
Price web search
10000
Price overrides
[]
Context
1000000
Max completion tokens
128000
Modality
text+image+file->text
Input modalities
["text","image","file"]
Output modalities
["text"]
Tokenizer
Claude
Knowledge cutoff
null
Created
1779905091
Moderated
false
Params
["include_reasoning","max_completion_tokens","max_tokens","reasoning","reasoning_effort","response_format","stop","structured_outputs","tool_choice","tools","verbosity"]
Default parameters
{}
Tools
true
Reasoning
true
Reasoning efforts
["max","xhigh","high","medium","low","none"]
Reasoning default effort
high
Reasoning mandatory
false
Reasoning default enabled
false
Vision
true
Expiration date
null
Page dataOpen JSON
page.json
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  "body": [
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  "hero": "",
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