Claude Opus 4.8

Anthropic · Released May 28, 2026

Input price / MTok

$25

Output price / MTok

1.0M

Context window

Tokens / sec

88.6

SWE-bench Verified

69.2

SWE-bench Pro

93.6

GPQA Diamond

83.4

OSWorld

Summary

Claude Opus 4.8 is a proprietary language model from Anthropic, released on May 28, 2026.

At $5 input and $25 output per million tokens, it ranks #34 of 40 for input price, placing it mid-range on input cost.

Its context window of 1.0M tokens ranks #17 of 41 for context depth in this dataset.

It targets coding, agents, reasoning workloads.

Throughput is measured at 65 tokens per second (ranked #20 of 23 for throughput).

Best of the 4.x line for complex agentic and coding work.

Benchmarks

Technical specs

Anthropic

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Speed source: https://artificialanalysis.ai/models/claude-opus-4-8