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Claude Opus 4.8 vs Gemini 1.0 Ultra

Anthropic Claude Opus 4.8 vs Google Gemini 1.0 Ultra — side-by-side specs.

Anthropic
Claude Opus 4.8
Google
Gemini 1.0 Ultra
Overview
CompanyAnthropicGoogle
Release dateMay 28 2026Feb 8 2024
Model type
Open sourceNoNo
Specifications
Parameters
Context window
Benchmarks
Agentic coding
SWE-Bench Pro
69.2%
Agentic terminal coding
Terminal-Bench 2.1
74.6%
Multidisciplinary reasoning
Humanity's Last Exam · no tools
49.8%
Multidisciplinary reasoning
Humanity's Last Exam · with tools
57.9%
Agentic computer use
OSWorld-Verified
83.4%
Agentic financial analysis
Finance Agent v2
53.9%
Knowledge work
GDPval-AA
1890
Timeline
Release gapGemini 1.0 Ultra shipped 840 days before Claude Opus 4.8

Which is better: Claude Opus 4.8 or Gemini 1.0 Ultra?

Claude Opus 4.8 and Gemini 1.0 Ultra don't publish scores on any of the same benchmarks, so there's no direct head-to-head comparison. Gemini 1.0 Ultra shipped 840 days before Claude Opus 4.8, so benchmark comparisons should account for the intervening progress.

Published specifications for these two models are limited — see each model page for the latest details.

Direct benchmark comparisons are unavailable — Claude Opus 4.8 and Gemini 1.0 Ultra don't publish scores on any of the same benchmarks.

Frequently asked questions

When was Claude Opus 4.8 released?
Claude Opus 4.8 was released by Anthropic on May 28 2026.
When was Gemini 1.0 Ultra released?
Gemini 1.0 Ultra was released by Google on Feb 8 2024.

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