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© 2026 CompareLLM. Public benchmark data aggregated from Arena Elo, LiveBench, SWE-bench & OpenRouter.

Every score has a dated snapshot.

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  3. Claude Opus 4 vs Gemini 3.6 Flash

Pairwise benchmark snapshot · Aug 16, 2026

Claude Opus 4 vs Gemini 3.6 Flash benchmark

In this head-to-head showdown, Gemini 3.6 Flash delivers higher overall intelligence and human-preferred responses (Elo 1,506 vs 1,490), while Claude Opus 4 leads in SWE-bench software engineering benchmarks (72.5%), while Gemini 3.6 Flash is more budget-friendly at $3.75/1M per 1M output tokens. Review the complete breakdown below to determine which model best fits your performance and budget requirements.

Executive Comparison Verdict

Bottom Line: Gemini 3.6 Flash holds the advantage over Claude Opus 4 in overall benchmark performance and human evaluation rankings. Choose Gemini 3.6 Flash for demanding workloads, or review the breakdown below to compare coding and pricing metrics.
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Verified Head-to-Head Advantage Breakdown

10 direct benchmark disciplines evaluated across capability, speed, and cost

Claude Opus 4 (2)Gemini 3.6 Flash (8)
Claude Opus 4
2 of 10 Wins
✓SWE-bench✓GPQA Diamond
Gemini 3.6 Flash
8 of 10 Wins
✓Preference Elo✓Coding Elo✓LiveBench✓Time to first token✓Output speed✓Input price✓Output price✓Context window
Anthropic
Leads 2 of 10 metrics
Claude Opus 4

First Claude 4 Opus generation. Baseline for opus 4 vs opus 5.

Elo 1,490$75/1M out
Google
Leads 8 of 10 metrics
Gemini 3.6 Flash

Google Jul 21 workhorse. Now shares the 3.7 Flash introductory $0.75/$3.75 rate through Dec 31 2026.

3.6 FlashElo 1,506$3.75/1M out
Top Rival Showdowns for Claude Opus 4
All Matchups
Compare vs:vs GPT-5vs Gemini 3 Provs Grok 4.6vs DeepSeek V4 Provs Qwen 3 Max
Preference LeaderGemini 3.6 Flash Wins

Gemini 3.6 Flash

Δ 16 Arena Elo pts

Throughput LeaderGemini 3.6 Flash Wins

Gemini 3.6 Flash

198 tok/s

Value per Dollar LeaderGemini 3.6 Flash Wins

Gemini 3.6 Flash

$3.75 / 1M output

Capability Percentiles

Relative percentile scores computed across all active models in the benchmark catalog.

Multi-Dimensional Capability Radar

Leaders Matchup Capability Radar

Comparing top Western standard models with China's leading frontier rival across 6 skill dimensions. Tap any spoke or dot to inspect.

Tap any node to inspect
Percentile 0–100
Head-to-Head Comparison

Overall Matchup Breakdown

Category wins across reasoning intelligence, generation speed, and token cost.

Claude Opus 4 (2)vsGemini 3.6 Flash (8)
Claude Opus 4: 2W (20%)Overall: Gemini 3.6 FlashGemini 3.6 Flash: 8W (80%)
← Claude Opus 4Gemini 3.6 Flash →
🏆Gemini 3.6 Flash(3/5)

Intelligence & Reasoning

Preference Elo, Coding proficiency, SWE-bench & LiveBench accuracy

Benchmark
Claude Opus 4vsGemini 3.6 Flash
Preference Elo
1,490vs1,506+16
Coding Elo
1,502vs1,514+12
SWE-bench
72.5%vs70.8%+1.7%
LiveBench
66.8%vs67.2%+0.4%
GPQA Diamond
80.4%vs79.6%+0.8%
Claude Opus 4: 2WGemini 3.6 Flash: 3W
🏆Gemini 3.6 Flash(2/2)

Speed & Latency

Generation throughput and time to first token responsiveness

Benchmark
Claude Opus 4vsGemini 3.6 Flash
Output speed
58 tok/svs198 tok/s+140 tok/s
Time to first token
390 msvs92 ms+298 ms
Claude Opus 4: 0WGemini 3.6 Flash: 2W
🏆Gemini 3.6 Flash(3/3)

Pricing & Capacity

Cost per million tokens and max context window length

Benchmark
Claude Opus 4vsGemini 3.6 Flash
Output price
$75/1Mvs$3.75/1M+$71.25/1M
Input price
$15/1Mvs$0.75/1M+$14.25/1M
Context window
200kvs1M+849k
Claude Opus 4: 0WGemini 3.6 Flash: 3W

Side-by-Side Benchmark Matrix

Preference Elo+16
Claude Opus 41,490
seed-bootstrap · Aug 1, 2026
Gemini 3.6 Flash1,506
seed-bootstrap · Aug 16, 2026
Coding Elo+12
Claude Opus 41,502
seed-bootstrap · Aug 1, 2026
Gemini 3.6 Flash1,514
seed-bootstrap · Aug 16, 2026
LiveBench+0.4%
Claude Opus 466.8%
seed-bootstrap · Aug 1, 2026
Gemini 3.6 Flash67.2%
seed-bootstrap · Aug 16, 2026
SWE-bench+1.7%
Claude Opus 472.5%
seed-bootstrap · Aug 1, 2026
Gemini 3.6 Flash70.8%
seed-bootstrap · Aug 16, 2026
GPQA Diamond+0.8%
Claude Opus 480.4%
seed-bootstrap · Aug 1, 2026
Gemini 3.6 Flash79.6%
seed-bootstrap · Aug 16, 2026
Time to first token+298 ms
Claude Opus 4390 ms
seed-bootstrap · Aug 1, 2026
Gemini 3.6 Flash92 ms
seed-bootstrap · Aug 16, 2026
Output speed+140 tok/s
Claude Opus 458 tok/s
seed-bootstrap · Aug 1, 2026
Gemini 3.6 Flash198 tok/s
seed-bootstrap · Aug 16, 2026
Input price+$14.25/1M
Claude Opus 4$15/1M
seed-bootstrap · Aug 1, 2026
Gemini 3.6 Flash$0.75/1M
seed-bootstrap · Aug 16, 2026
Output price+$71.25/1M
Claude Opus 4$75/1M
seed-bootstrap · Aug 1, 2026
Gemini 3.6 Flash$3.75/1M
seed-bootstrap · Aug 16, 2026
Context window+849k
Claude Opus 4200k
seed-bootstrap · Aug 1, 2026
Gemini 3.6 Flash1M
seed-bootstrap · Aug 16, 2026
BenchmarkClaude Opus 4Gemini 3.6 FlashAdvantage Delta
Preference Elo
1,490
seed-bootstrap · Aug 1, 2026
1,506
seed-bootstrap · Aug 16, 2026
+16
Coding Elo
1,502
seed-bootstrap · Aug 1, 2026
1,514
seed-bootstrap · Aug 16, 2026
+12
LiveBench
66.8%
seed-bootstrap · Aug 1, 2026
67.2%
seed-bootstrap · Aug 16, 2026
+0.4%
SWE-bench
72.5%
seed-bootstrap · Aug 1, 2026
70.8%
seed-bootstrap · Aug 16, 2026
+1.7%
GPQA Diamond
80.4%
seed-bootstrap · Aug 1, 2026
79.6%
seed-bootstrap · Aug 16, 2026
+0.8%
Time to first token
390 ms
seed-bootstrap · Aug 1, 2026
92 ms
seed-bootstrap · Aug 16, 2026
+298 ms
Output speed
58 tok/s
seed-bootstrap · Aug 1, 2026
198 tok/s
seed-bootstrap · Aug 16, 2026
+140 tok/s
Input price
$15/1M
seed-bootstrap · Aug 1, 2026
$0.75/1M
seed-bootstrap · Aug 16, 2026
+$14.25/1M
Output price
$75/1M
seed-bootstrap · Aug 1, 2026
$3.75/1M
seed-bootstrap · Aug 16, 2026
+$71.25/1M
Context window
200k
seed-bootstrap · Aug 1, 2026
1M
seed-bootstrap · Aug 16, 2026
+849k
Interactive Simulator (USD)

Workload Cost & Savings Calculator

Simulate monthly production API costs in USD (US Dollar).

Save up to 95% with Gemini 3.6 Flash
Monthly Volume50M tokens/mo
Quick Presets:
Token Ratio (In vs Out)70% In / 30% Out
RAG / Search (10% out)Coding / Chat (50% out)
Claude Opus 4$1,650.00 / mo
In: $525Out: $1,125
Gemini 3.6 Flash$82.50 / mo
In: $26.25Out: $56.25
Estimated Cost Delta

Gemini 3.6 Flash is estimated to save $1,567.50/month ($18,810/year).

Based on 50M tokens (30% gen)

Key Selection Recommendations

  • 1
    Claude Opus 4:Pick Claude Opus 4 when repo-level coding accuracy is the constraint.
  • 2
    Gemini 3.6 Flash:Pick Gemini 3.6 Flash when you are optimizing output cost.
  • 3
    Gemini 3.6 Flash:Pick Gemini 3.6 Flash when time-to-first-token matters more than peak Elo.

Recommended Workload Routing

Repo / coding agentsClaude Opus 4

Higher SWE-bench (72.5%).

High-volume chatGemini 3.6 Flash

Lower output list price ($3.75/1M).

Voice / low-latency UIGemini 3.6 Flash

Lower TTFT (92 ms).

Long-document RAGGemini 3.6 Flash

Larger window (1M).

Screenshots / visionGemini 3.6 Flash

Both accept images. Defaulting to the higher-Elo side (Gemini 3.6 Flash).

Target WorkloadRecommended PickEvaluation Rationale
Repo / coding agentsClaude Opus 4Higher SWE-bench (72.5%).
High-volume chatGemini 3.6 FlashLower output list price ($3.75/1M).
Voice / low-latency UIGemini 3.6 FlashLower TTFT (92 ms).
Long-document RAGGemini 3.6 FlashLarger window (1M).
Screenshots / visionGemini 3.6 FlashBoth accept images. Defaulting to the higher-Elo side (Gemini 3.6 Flash).

Related Editorial Dispatches & Benchmark Notes

View all news
priceAug 13, 2026

Gemini 3.6 Flash (Jul 21) now shares the 3.7 intro rate

Jul 21 workhorse that inherited $0.75/$3.75 through year-end. Keep the row; 3.7 is the newer sibling.

Community Sentiment

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CompareLLM AI Matrix

Verified Head-to-Head Telemetry

LIVE BENCHMARK
VS
Anthropic

Claude Opus 4

Elo 1,490
SWE-bench72.5%
Speed (tok/s)58 tok/s
Input / 1M Tokens$15/1M
Output / 1M Tokens$75/1M
Google

Gemini 3.6 Flash

Elo 1,506
SWE-bench70.8%
Speed (tok/s)198 tok/s
Input / 1M Tokens$0.75/1M
Output / 1M Tokens$3.75/1M

Frequently Asked Questions

Which is better overall, Claude Opus 4 or Gemini 3.6 Flash?
Gemini 3.6 Flash has the higher preference Elo in our latest snapshot (1,506). “Better” still depends on coding, price, and latency — see the table.
Which is better at coding, Claude Opus 4 or Gemini 3.6 Flash?
Claude Opus 4 leads SWE-bench at 72.5% vs 70.8%. SWE-bench is one harness, not your repo.
Which is cheaper to run in production?
Gemini 3.6 Flash output tokens are $3.75/1M versus $75/1M. Input prices and retry rates still move the real bill.
Which is faster, Claude Opus 4 or Gemini 3.6 Flash?
Gemini 3.6 Flash has the lower time-to-first-token (92 ms vs 390 ms). Tokens/sec is a separate column if you care about long completions.
Which has the larger context window?
Gemini 3.6 Flash accepts 1M tokens versus 200k.
Can I self-host either model?
Neither model is marked open-weights here. You are comparing hosted APIs.
Are these scores from CompareLLM’s own evals?
No. V1 aggregates public leaderboards (and optional first-party latency pings). Each cell names its source and date. Read /methodology.
What does preference Elo mean on this page?
Preference Elo is a crowd vote from LMArena / Arena. People see two hidden answers and pick the one they like more. The model that wins more often gets a higher Elo. That means people preferred it — not that it passed a school test. It is not SWE-bench, not accuracy, and not a number we invent. Claude Opus 4 and Gemini 3.6 Flash Elo cells are dated snapshots from the named source — we do not compute Arena ourselves.

Related news

  • price · Aug 13, 2026

    Gemini 3.6 Flash (Jul 21) now shares the 3.7 intro rate

Similar Head-to-Head Comparisons

All Claude Opus 4 matchups →|All Gemini 3.6 Flash matchups →
Claude Opus 4 vs Claude 3 Opus (previous opus)Claude Opus 4 vs Claude Opus 4.5 (next opus)Gemini 3.6 Flash vs Gemini 3 Flash (previous gemini-flash)Gemini 3.6 Flash vs Gemini 3.7 Flash (next gemini-flash)Gemini 2.0 Flash Thinking vs Claude Opus 4Gemini 3 Flash vs Claude Opus 4