Compare · ModelsLive · 2 picked · head to head
Gemini 3.8 Flash vs Claude Opus 5
Side by side · benchmarks, pricing, and signals you can act on.
Winner summary
Claude Opus 5 wins on 10/15 benchmarks
Claude Opus 5 wins 10 of 15 shared benchmarks. Leads in agentic · coding · general.
Category leads
agentic·Claude Opus 5knowledge·Gemini 3.8 Flashcoding·Claude Opus 5general·Claude Opus 5math·Claude Opus 5
Hype vs Reality
Attention vs performance
Gemini 3.8 Flash
#63 by perf·#8 by attention
Claude Opus 5
#21 by perf·#6 by attention
Best value
Gemini 3.8 Flash
5.5x better value than Claude Opus 5
Gemini 3.8 Flash
25.5 pts/$
$2.25/M
Claude Opus 5
4.6 pts/$
$15.00/M
Vendor risk
Who is behind the model
Google DeepMind
$4.20T·Tier 1
Anthropic
$965.0B·Tier 1
Head to head
15 benchmarks · 2 models
Gemini 3.8 FlashClaude Opus 5
APEX-Agents
Claude Opus 5 leads by +1.5
APEX-Agents · evaluates AI agents on complex, multi-step tasks requiring planning, tool use, and autonomous decision-making in realistic environments.
Gemini 3.8 Flash
64.3
Claude Opus 5
65.8
Chess Puzzles
Gemini 3.8 Flash leads by +20.0
Chess Puzzles · tests strategic and tactical reasoning by having models solve chess puzzle positions, evaluating lookahead and pattern recognition abilities.
Gemini 3.8 Flash
59.0
Claude Opus 5
39.0
Deepswe
Gemini 3.8 Flash leads by +0.2
Gemini 3.8 Flash
73.8
Claude Opus 5
73.7
Dtbench
Claude Opus 5 leads by +3.6
Gemini 3.8 Flash
92.9
Claude Opus 5
96.5
Frontiercode
Claude Opus 5 leads by +12.2
Gemini 3.8 Flash
41.2
Claude Opus 5
53.4
FrontierMath-Tier-4-v2-Private
Claude Opus 5 leads by +51.2
Gemini 3.8 Flash
21.9
Claude Opus 5
73.2
FrontierMath-Tiers-1-3-v2-Private
Claude Opus 5 leads by +17.2
Gemini 3.8 Flash
68.4
Claude Opus 5
85.6
Frontierswe
Claude Opus 5 leads by +32.4
Gemini 3.8 Flash
19.6
Claude Opus 5
52.0
Furniture Assembly
Claude Opus 5 leads by +41.7
Gemini 3.8 Flash
2.4
Claude Opus 5
44.0
GPQA diamond
Gemini 3.8 Flash leads by +2.0
Graduate-Level Google-Proof QA (Diamond set) · expert-crafted questions in physics, biology, and chemistry that are difficult even for domain PhDs.
Gemini 3.8 Flash
93.9
Claude Opus 5
91.8
Lmca
Claude Opus 5 leads by +13.6
Gemini 3.8 Flash
62.2
Claude Opus 5
75.8
Mystery Game Puzzles
Claude Opus 5 leads by +13.2
Gemini 3.8 Flash
41.6
Claude Opus 5
54.8
OTIS Mock AIME 2024-2025
OTIS Mock AIME 2024-2025 · simulated American Invitational Mathematics Examination problems testing advanced problem-solving skills.
Gemini 3.8 Flash
98.9
Claude Opus 5
98.9
Proofbench
Claude Opus 5 leads by +51.0
Gemini 3.8 Flash
48.0
Claude Opus 5
99.0
SimpleQA Verified
Gemini 3.8 Flash leads by +9.8
SimpleQA Verified · short factual questions with verified answers, measuring factual accuracy and the tendency to hallucinate or provide incorrect information.
Gemini 3.8 Flash
69.7
Claude Opus 5
59.9
Full benchmark table
| Benchmark | Gemini 3.8 Flash | Claude Opus 5 |
|---|---|---|
APEX-Agents APEX-Agents · evaluates AI agents on complex, multi-step tasks requiring planning, tool use, and autonomous decision-making in realistic environments. | 64.3 | 65.8 |
Chess Puzzles Chess Puzzles · tests strategic and tactical reasoning by having models solve chess puzzle positions, evaluating lookahead and pattern recognition abilities. | 59.0 | 39.0 |
Deepswe | 73.8 | 73.7 |
Dtbench | 92.9 | 96.5 |
Frontiercode | 41.2 | 53.4 |
FrontierMath-Tier-4-v2-Private | 21.9 | 73.2 |
FrontierMath-Tiers-1-3-v2-Private | 68.4 | 85.6 |
Frontierswe | 19.6 | 52.0 |
Furniture Assembly | 2.4 | 44.0 |
GPQA diamond Graduate-Level Google-Proof QA (Diamond set) · expert-crafted questions in physics, biology, and chemistry that are difficult even for domain PhDs. | 93.9 | 91.8 |
Lmca | 62.2 | 75.8 |
Mystery Game Puzzles | 41.6 | 54.8 |
OTIS Mock AIME 2024-2025 OTIS Mock AIME 2024-2025 · simulated American Invitational Mathematics Examination problems testing advanced problem-solving skills. | 98.9 | 98.9 |
Proofbench | 48.0 | 99.0 |
SimpleQA Verified SimpleQA Verified · short factual questions with verified answers, measuring factual accuracy and the tendency to hallucinate or provide incorrect information. | 69.7 | 59.9 |
Pricing · per 1M tokens · projected $/mo at 10M tokens
| Model | Input | Output | Context | Projected $/mo |
|---|---|---|---|---|
| $0.75 | $3.75 | 1.0M tokens (~524 books) | $15.00 | |
| $5.00 | $25.00 | 1.0M tokens (~500 books) | $100.00 |