Claude Opus 4.8on Krater.ai

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

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Released May 27, 2026

Specifications

Claude Opus 4.8 at a glance

Context

1M tokens

Max output

128K tokens

Input

Text, Image, File

Output

Text

Input price

$5.00 / 1M

Output price

$25.00 / 1M

Krater rank

#29

Image inputTool callingStructured outputsReasoning supportProvider moderated

Is Claude down?

Claude slow or throwing errors? The live Claude status page shows Anthropic incidents and which Krater models to use meanwhile.

Live Claude status

Capabilities

What it is good at

Catalog capabilities

  • Accepts image input
  • Generates text responses
  • Supports tool calling
  • Supports structured outputs

Good for

Image understandingLong documentsUse with toolsStructured responsesDeep analysis

Benchmarks

Catalog data, not Krater benchmarks.

Coding index score

74.3

Agentic index score

41.9

Intelligence index score

41.8

Design Arena agenticslides rank

#1

Design Arena agenticslides(python-pptx) rank

#1

Claude Opus 4.8

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Compare Claude Opus 4.8

Claude Opus 4.8 vs Claude Fable 5.1

Claude Fable 5.1 improves on Claude Fable 5 across the board, with the biggest gains in agentic coding, long-running agentic workflows, and knowledge work: long code refactors, front-end and visual

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Claude Opus 4.8 vs Claude Haiku 5.5

Claude Haiku 5.5 is Anthropic's small, fast model for high-volume, cost-sensitive work such as summarization, subagents, and browser use.

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Claude Opus 4.8 vs Claude Fable 5

Claude Fable 5 is a Mythos-class model from Anthropic, built for autonomous knowledge work and coding.

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FAQ

Questions about Claude Opus 4.8

Clear answers based on the model catalog and Krater access.

Claude Opus 4.8 supports a context window of 1,000,000 tokens.

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