Data points: 166
Model compare
The readout for Claude Opus 4.6 and Gemini 3.5 Flash, before the detailed comparison sheet.
Weighted outcome: Gemini 3.5 Flash. Benchmark capability categories carry 80%, while price, API performance, and availability carry 20%.
Decision read
Gemini 3.5 Flash
Gemini 3.5 Flash has the higher weighted result; Model A / B score 42.9 to 57.1.
Evidence depth
166 data points
Includes 39 benchmark rows, 5 audit samples, and 8 provider examples.
Selection signal
Start with Gemini 3.5 Flash
The charts below split 52 high-signal samples across speed, scores, and audit health.
Switch either side of this report to compare another model with the same LMSpeed data pipeline.
Select a different model to open a new comparison URL.
This report only uses LMSpeed data for Claude Opus 4.6 and Gemini 3.5 Flash: pricing, speed aggregates, third-party benchmark scores, and shared provider samples.
| Model compare | Claude Opus 4.6 | Gemini 3.5 Flash |
|---|---|---|
| Overall leader | Contender | Leading |
| Weighted overall score | 42.9 pts | 57.1 pts |
| Benchmark category leads | 2 categories | 5 categories |
| Operational advantages | Cheapest input price, Free providers, Provider coverage | No data |
| Context window | 1M tokens | 1.0M tokens |
| Max output | 128K tokens | 65.5K tokens |
| Modalities | Input TextImageFile Output Text |
The overall result weights benchmark capability categories at 80% and price, API speed/latency, and availability at 20%. Recent test volume does not affect the winner, and missing benchmark categories are excluded.
| Model compare | Claude Opus 4.6 | Gemini 3.5 Flash |
|---|---|---|
| Developer | Anthropic | |
| Released | Feb 2026 | May 2026 |
| Parameters | No data | No data |
| Tokenizer | Claude | Gemini |
| Knowledge cutoff | No data | 2025-01-01 |
| OpenRouter ID | anthropic/claude-opus-4.6 | google/gemini-3.5-flash |
| References | No data | No data |
This report only uses LMSpeed data for Claude Opus 4.6 and Gemini 3.5 Flash: pricing, speed aggregates, third-party benchmark scores, and shared provider samples.
Claude Opus 4.6
Claude Opus 4.6 is stronger in benchmark categories (Coding, Math) and operational dimensions (Cheapest input price, Free providers, Provider coverage).
Gemini 3.5 Flash
Gemini 3.5 Flash leads these benchmark categories: Agents, Reasoning, Knowledge, Multimodal, Instruction following.
Third-party benchmark profile synced into LMSpeed; only metrics available for both models are shown.
Compare benchmark category scores on a 0-100 scale. Select a category to inspect the gap.
Avg. score
Claude Opus 4.6
53.4
Avg. score
Gemini 3.5 Flash
56.3
Gemini 3.5 Flash leads by 3.8
Claude Opus 4.6 leads by 4.9
Gemini 3.5 Flash leads by 0.5
Metric-level scores with benchmark source, rank depth, confidence, error, and evaluation date where available.
Claude Opus 4.6
69.0
Rank #17/83 · confidence 3 · eval date 2026-02-01
Gemini 3.5 Flash
winner71.0
Rank #16/83 · confidence 4 · eval date 2026-05-19
Claude Opus 4.6
44.7 tok/s
Rank #120/139 · confidence 4
Gemini 3.5 Flash
winner240.1 tok/s
Rank #9/139 · confidence 4
Claude Opus 4.6
winner2.00 s
Rank #55/139 · confidence 4
Gemini 3.5 Flash
10.48 s
Rank #75/139 · confidence 4
Claude Opus 4.6
winner2.00 s
Rank #99/139 · confidence 4
Gemini 3.5 Flash
10.48 s
Rank #117/139 · confidence 4
Claude Opus 4.6
$10.00/M
Rank #148/163 · confidence 4
Gemini 3.5 Flash
winner$3.38/M
Rank #118/163 · confidence 4
Claude Opus 4.6
$5.00/M
Rank #147/163 · confidence 4
Gemini 3.5 Flash
winner$1.50/M
Rank #120/163 · confidence 4
Claude Opus 4.6
$25.00/M
Rank #148/163 · confidence 4
Gemini 3.5 Flash
winner$9.00/M
Rank #121/163 · confidence 4
Claude Opus 4.6
84.0%
Rank #52/187 · confidence 4
Gemini 3.5 Flash
winner92.2%
Rank #9/187 · confidence 4
Claude Opus 4.6
18.6%
Rank #61/186 · confidence 4
Gemini 3.5 Flash
winner41.0%
Rank #9/186 · confidence 4
Claude Opus 4.6
2.8
Rank #43/73 · confidence 3 · eval date 2026-02-01
Gemini 3.5 Flash
winner13.1
Rank #16/73 · confidence 4 · eval date 2026-05-19
Claude Opus 4.6
58.3
Rank #62/89 · confidence 3 · eval date 2026-02-01
Gemini 3.5 Flash
winner69.3
Rank #22/89 · confidence 4 · eval date 2026-05-19
Claude Opus 4.6
winner57.6
Rank #5/33 · confidence 3 · eval date 2026-02-01
Gemini 3.5 Flash
48.7
Rank #9/33 · confidence 4 · eval date 2026-05-19
Claude Opus 4.6
winner67.2
Rank #10/64 · confidence 3 · eval date 2026-02-01
Gemini 3.5 Flash
58.5
Rank #28/64 · confidence 4 · eval date 2026-05-19
Claude Opus 4.6
45.7%
Rank #32/184 · confidence 4
Gemini 3.5 Flash
winner53.1%
Rank #11/184 · confidence 4
Claude Opus 4.6
45.7
Rank #37/96 · confidence 3 · eval date 2026-02-01
Gemini 3.5 Flash
winner53.1
Rank #15/96 · confidence 4 · eval date 2026-05-19
Claude Opus 4.6
53.4
Rank #30/37 · confidence 3 · eval date 2026-02-01
Gemini 3.5 Flash
winner55.1
Rank #27/37 · confidence 4 · eval date 2026-05-19
Claude Opus 4.6
winner22.9
Rank #10/35 · confidence 3 · eval date 2026-02-01
Gemini 3.5 Flash
14.6
Rank #14/35 · confidence 4 · eval date 2026-05-19
Claude Opus 4.6
winner40.7
Rank #10/47 · confidence 3 · eval date 2026-02-01
Gemini 3.5 Flash
39.0
Rank #12/47 · confidence 4 · eval date 2026-05-19
Claude Opus 4.6
winner59.8
Rank #22/56 · confidence 3 · eval date 2026-02-01
Gemini 3.5 Flash
56.0
Rank #27/56 · confidence 4 · eval date 2026-05-19
Claude Opus 4.6
3.5
Rank #23/29 · confidence 3 · eval date 2026-02-01
Gemini 3.5 Flash
winner22.7
Rank #6/29 · confidence 4 · eval date 2026-05-19
Claude Opus 4.6
45.2
Rank #15/90 · confidence 3 · eval date 2026-02-01
Gemini 3.5 Flash
winner51.9
Rank #7/90 · confidence 4 · eval date 2026-05-19
Claude Opus 4.6
winner85.8
Rank #7/54 · confidence 3 · eval date 2026-02-01
Gemini 3.5 Flash
66.2
Rank #32/54 · confidence 4 · eval date 2026-05-19
Claude Opus 4.6
18.6
Rank #56/96 · confidence 3 · eval date 2026-02-01
Gemini 3.5 Flash
winner41.0
Rank #8/96 · confidence 4 · eval date 2026-05-19
Claude Opus 4.6
89.2
Rank #15/23 · confidence 3 · eval date 2026-02-01
Gemini 3.5 Flash
winner92.7
Rank #8/23 · confidence 4 · eval date 2026-05-19
Claude Opus 4.6
84.0
Rank #52/96 · confidence 3 · eval date 2026-02-01
Gemini 3.5 Flash
winner92.2
Rank #9/96 · confidence 4 · eval date 2026-05-19
Claude Opus 4.6
37.8
Rank #39/99 · confidence 3 · eval date 2026-02-01
Gemini 3.5 Flash
winner50.2
Rank #12/99 · confidence 4 · eval date 2026-05-19
Claude Opus 4.6
winner76.0
Rank #45/90 · confidence 3 · eval date 2026-02-01
Gemini 3.5 Flash
60.7
Rank #62/90 · confidence 4 · eval date 2026-05-19
Claude Opus 4.6
72.5
Rank #36/57 · confidence 3 · eval date 2026-02-01
Gemini 3.5 Flash
winner84.3
Rank #1/57 · confidence 4 · eval date 2026-05-19
Claude Opus 4.6
winner1328.0
Rank #3/65 · confidence 3 · eval date 2026-02-01
Gemini 3.5 Flash
1287.0
Rank #18/65 · confidence 4 · eval date 2026-05-19
Claude Opus 4.6
77.3
Rank #19/26 · confidence 3 · eval date 2026-02-01
Gemini 3.5 Flash
winner83.6
Rank #3/26 · confidence 4 · eval date 2026-05-19
Claude Opus 4.6
61.1
Rank #22/34 · confidence 3 · eval date 2026-02-01
Gemini 3.5 Flash
winner84.0
Rank #4/34 · confidence 4 · eval date 2026-05-19
Claude Opus 4.6
44.6
Rank #61/86 · confidence 3 · eval date 2026-02-01
Gemini 3.5 Flash
winner76.3
Rank #13/86 · confidence 4 · eval date 2026-05-19
Claude Opus 4.6
33.0
Rank #5/21 · confidence 1 · eval date 2026-02-01
Gemini 3.5 Flash
winner47.1
Rank #1/21 · confidence 4 · eval date 2026-05-19
Claude Opus 4.6
winner19.9
Rank #4/19 · confidence 3 · eval date 2026-02-01
Gemini 3.5 Flash
18.0
Rank #8/19 · confidence 4 · eval date 2026-05-19
Claude Opus 4.6
72.7
Rank #10/21 · confidence 3 · eval date 2026-02-01
Gemini 3.5 Flash
winner78.4
Rank #5/21 · confidence 4 · eval date 2026-05-19
Claude Opus 4.6
61.9
Rank #10/50 · confidence 3 · eval date 2026-02-01
Gemini 3.5 Flash
61.9
Rank #10/50 · confidence 4 · eval date 2026-05-19
Claude Opus 4.6
65.4
Rank #21/45 · confidence 3 · eval date 2026-02-01
Gemini 3.5 Flash
winner76.2
Rank #10/45 · confidence 4 · eval date 2026-05-19
Claude Opus 4.6
65.3
Rank #21/52 · confidence 3 · eval date 2026-02-01
Gemini 3.5 Flash
winner77.7
Rank #12/52 · confidence 4 · eval date 2026-05-19
Claude Opus 4.6
84.8
Rank #44/84 · confidence 3 · eval date 2026-02-01
Gemini 3.5 Flash
winner95.3
Rank #17/84 · confidence 4 · eval date 2026-05-19
Latest completed audits from shared providers, with four safety and integrity score groups plus report links.
| Provider | Claude Opus 4.6 | Gemini 3.5 Flash |
|---|---|---|
Winner: Claude Opus 4.6 | Claude Opus 4.6 claude-opus-4-6 Audit score 91 7610086100 | Gemini 3.5 Flash gemini-3.5-flash No audit yet |
Winner: Claude Opus 4.6 | Claude Opus 4.6 claude-opus-4-6 Audit score 89 56100100100 | Gemini 3.5 Flash gemini-3.5-flash No audit yet |
Winner: Claude Opus 4.6 | Claude Opus 4.6 claude-opus-4-6 Audit score 84 648486100 | Gemini 3.5 Flash gemini-3.5-flash No audit yet |
Winner: Claude Opus 4.6 | Claude Opus 4.6 claude-opus-4-6 Audit score 82 668478100 | Gemini 3.5 Flash [按量]gemini-3.5-flash No audit yet |
Winner: Claude Opus 4.6 | Claude Opus 4.6 claude-opus-4-6 Audit score 78 70728088 | Gemini 3.5 Flash [平馆]gemini-3.5-flash No audit yet |
Speed aggregates and input/output pricing share each provider row for real API selection and migration cost checks.
| Provider | Claude Opus 4.6 | Gemini 3.5 Flash |
|---|---|---|
15 tests | Claude Opus 4.6 speed / latency 57 tok/s / 3926ms input / output No data | Gemini 3.5 Flash speed / latency N/A / N/A input / output No data |
10 tests | Claude Opus 4.6 speed / latency 84 tok/s / 3916ms input / output No data | Gemini 3.5 Flash speed / latency N/A / N/A input / output No data |
5 tests | Claude Opus 4.6 speed / latency 43 tok/s / 2285ms input / output No data | Gemini 3.5 Flash speed / latency N/A / N/A input / output No data |
5 tests | Claude Opus 4.6 speed / latency 27 tok/s / 15402ms input / output No data | Gemini 3.5 Flash speed / latency N/A / N/A input / output No data |
5 tests | Claude Opus 4.6 speed / latency 46 tok/s / 2559ms input / output No data | Gemini 3.5 Flash speed / latency N/A / N/A input / output No data |
Claude Opus 4.6 claude-opus-4-6 speed / latency No data input / output $0.479/M/$2.40/M | Gemini 3.5 Flash gemini-3.5-flash speed / latency No data input / output $0/M | |
Claude Opus 4.6 claude-opus-4-6 speed / latency No data input / output $0/M/$0/M | Gemini 3.5 Flash gemini-3.5-flash speed / latency No data input / output $75.00/M | |
Claude Opus 4.6 claude-opus-4-6 speed / latency No data input / output $0/request | Gemini 3.5 Flash gemini-3.5-flash speed / latency No data input / output $0/request |
Weighted outcome: Gemini 3.5 Flash. Benchmark capability categories carry 80%, while price, API performance, and availability carry 20%.
Input
Output
| Features | Text inputImage inputFile inputText outputTool callingStructured outputsJSON modeReasoning | Text inputImage inputFile inputAudio inputText outputTool callingStructured outputsJSON modeReasoning |
|---|
Gemini 3.5 Flash leads by 2.4
Claude Opus 4.6 leads by 1.4
Claude Opus 4.6
Gemini 3.5 Flash leads by 9.5
Gemini 3.5 Flash leads by 10.5
