Claude Opus 4.8vsGemini 3.5 Flash High

Claude Opus 4.8 leads the overall Podium Score by 2.0 points (76.0 vs 74.0).Category wins: Claude Opus 4.8 0 — 0 Gemini 3.5 Flash High.Gemini 3.5 Flash High is the cheaper pick ($5/M vs $15/M per 1M output tokens). Claude Opus 4.8 is faster (50 t/s vs 50 t/s).

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MetricClaude Opus 4.8Gemini 3.5 Flash High
Podium Score76.0 ▲74.0
Arena Elo1484—
Intelligence Index55.7—
Coding58.0—
Math58.7—
Reasoning82.8—
Agentic74.9—
Knowledge28.8—
Multimodal89.6—
Long-context99.2—
Output speed50 t/s50 t/s
Output price$15/M$5/M ▲
Context window1000K ▲128K
Scores aggregated from five leaderboards on 2026-08-05. See Methodology. More head-to-heads: Claude Opus 4.8 vs Claude Mythos Preview · Claude Opus 4.8 vs Claude Fable 5 · Claude Opus 4.8 vs Kimi K3 · Claude Opus 4.8 vs Claude Opus 5