Data points: 110
Model compare
The readout for Gemini 2.5 Flash and GPT-5, before the detailed comparison sheet.
Weighted outcome: GPT-5. Benchmark capability categories carry 80%, while price, API performance, and availability carry 20%.
Decision read
GPT-5
GPT-5 has the higher weighted result; Model A / B score 29.3 to 70.7.
Evidence depth
110 data points
Includes 22 benchmark rows, 0 audit samples, and 7 provider examples.
Selection signal
Start with GPT-5
The charts below split 29 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 Gemini 2.5 Flash and GPT-5: pricing, speed aggregates, third-party benchmark scores, and shared provider samples.
| Model compare | Gemini 2.5 Flash | GPT-5 |
|---|---|---|
| Overall leader | Contender | Leading |
| Weighted overall score | 29.3 pts | 70.7 pts |
| Benchmark category leads | 1 categories | 5 categories |
| Operational advantages | Cheapest input price, Average speed, Free providers, Provider coverage | First-token latency |
| Context window | 1.0M tokens | 400K tokens |
| Max output | 65.5K tokens | 128K tokens |
| Modalities | Input FileImageTextAudiovideo |
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 | Gemini 2.5 Flash | GPT-5 |
|---|---|---|
| Developer | OpenAI | |
| Released | Jun 2025 | Aug 2025 |
| Parameters | No data | No data |
| Tokenizer | Gemini | GPT |
| Knowledge cutoff | 2025-01-31 | 2024-09-30 |
| OpenRouter ID | google/gemini-2.5-flash | openai/gpt-5 |
| References | No data | No data |
This report only uses LMSpeed data for Gemini 2.5 Flash and GPT-5: pricing, speed aggregates, third-party benchmark scores, and shared provider samples.
Gemini 2.5 Flash
Gemini 2.5 Flash is stronger in benchmark categories (Coding) and operational dimensions (Cheapest input price, Average speed, Free providers, Provider coverage).
GPT-5
GPT-5 is stronger in benchmark categories (Agents, Reasoning, Knowledge, Math, Instruction following) and operational dimensions (First-token latency).
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
Gemini 2.5 Flash
45.4
Avg. score
GPT-5
51.9
GPT-5 leads by 9.4
Gemini 2.5 Flash leads by 2.0
GPT-5 leads by 2.4
GPT-5 leads by 8.1
GPT-5 leads by 10.8
No data
No data
GPT-5 leads by 10.0
Metric-level scores with benchmark source, rank depth, confidence, error, and evaluation date where available.
Gemini 2.5 Flash
winner$0.300/M
Rank #46/162 · confidence 4
GPT-5
$1.25/M
Rank #107/162 · confidence 4
Gemini 2.5 Flash
winner$0.850/M
Rank #67/162 · confidence 4
GPT-5
$3.44/M
Rank #117/162 · confidence 4
Gemini 2.5 Flash
winner$2.50/M
Rank #75/162 · confidence 4
GPT-5
$10.00/M
Rank #120/162 · confidence 4
Gemini 2.5 Flash
45.9
Rank #72/89 · confidence 1 · eval date 2025-06-17
GPT-5
winner75.6
Rank #2/89 · confidence 1 · eval date 2025-08-07
Gemini 2.5 Flash
1.4
Rank #50/73 · confidence 1 · eval date 2025-06-17
GPT-5
winner5.7
Rank #30/73 · confidence 1 · eval date 2025-08-07
Gemini 2.5 Flash
winner83.2%
Rank #40/125 · confidence 4
GPT-5
80.6%
Rank #57/125 · confidence 4
Gemini 2.5 Flash
winner79.0%
Rank #76/188 · confidence 4
GPT-5
67.3%
Rank #121/188 · confidence 4
Gemini 2.5 Flash
winner11.1%
Rank #89/187 · confidence 4
GPT-5
5.4%
Rank #132/187 · confidence 4
Gemini 2.5 Flash
winner69.5%
Rank #30/115 · confidence 4
GPT-5
55.8%
Rank #49/115 · confidence 4
Gemini 2.5 Flash
29.1
Rank #88/96 · confidence 1 · eval date 2025-06-17
GPT-5
winner42.9
Rank #46/96 · confidence 1 · eval date 2025-08-07
Gemini 2.5 Flash
winner39.4%
Rank #80/185 · confidence 4
GPT-5
38.8%
Rank #83/185 · confidence 4
Gemini 2.5 Flash
winner98.1%
Rank #7/74 · confidence 4
GPT-5
86.1%
Rank #42/74 · confidence 4
Gemini 2.5 Flash
winner82.3%
Rank #11/68 · confidence 4
GPT-5
36.7%
Rank #35/68 · confidence 4
Gemini 2.5 Flash
winner93.3
Rank #6/90 · confidence 1 · eval date 2025-06-17
GPT-5
82.1
Rank #31/90 · confidence 1 · eval date 2025-08-07
Gemini 2.5 Flash
26.5
Rank #51/90 · confidence 1 · eval date 2025-06-17
GPT-5
winner40.7
Rank #20/90 · confidence 1 · eval date 2025-08-07
Gemini 2.5 Flash
5.1
Rank #79/96 · confidence 1 · eval date 2025-06-17
GPT-5
winner26.5
Rank #39/96 · confidence 1 · eval date 2025-08-07
Gemini 2.5 Flash
68.3
Rank #76/96 · confidence 1 · eval date 2025-06-17
GPT-5
winner85.4
Rank #45/96 · confidence 1 · eval date 2025-08-07
Gemini 2.5 Flash
14.1
Rank #86/99 · confidence 1 · eval date 2025-06-17
GPT-5
winner34.7
Rank #48/99 · confidence 1 · eval date 2025-08-07
Gemini 2.5 Flash
65.5
Rank #43/57 · confidence 1 · eval date 2025-06-17
GPT-5
winner74.2
Rank #32/57 · confidence 1 · eval date 2025-08-07
Gemini 2.5 Flash
1145.0
Rank #55/66 · confidence 1 · eval date 2025-06-17
GPT-5
winner1214.0
Rank #40/66 · confidence 1 · eval date 2025-08-07
Gemini 2.5 Flash
39.0
Rank #74/86 · confidence 1 · eval date 2025-06-17
GPT-5
winner73.1
Rank #29/86 · confidence 1 · eval date 2025-08-07
Gemini 2.5 Flash
14.9
Rank #84/84 · confidence 1 · eval date 2025-06-17
GPT-5
winner84.8
Rank #44/84 · confidence 1 · eval date 2025-08-07
Latest completed audits from shared providers, with four safety and integrity score groups plus report links.
| Provider | Gemini 2.5 Flash | GPT-5 |
|---|---|---|
| No completed audits are available from shared providers yet. | ||
Speed aggregates and input/output pricing share each provider row for real API selection and migration cost checks.
| Provider | Gemini 2.5 Flash | GPT-5 |
|---|---|---|
25 tests | Gemini 2.5 Flash speed / latency 139 tok/s / 4002ms input / output No data | GPT-5 speed / latency N/A / N/A input / output No data |
20 tests | Gemini 2.5 Flash speed / latency N/A / N/A input / output No data | GPT-5 speed / latency 95 tok/s / 1234ms input / output No data |
15 tests | Gemini 2.5 Flash speed / latency 54 tok/s / 10365ms input / output No data | GPT-5 speed / latency 45 tok/s / 3704ms input / output No data |
10 tests | Gemini 2.5 Flash speed / latency 200 tok/s / 8207ms input / output No data | GPT-5 speed / latency 102 tok/s / 948ms input / output No data |
10 tests | Gemini 2.5 Flash speed / latency 141 tok/s / 2052ms input / output No data | GPT-5 speed / latency N/A / N/A input / output No data |
Gemini 2.5 Flash gemini-2.5-flash speed / latency No data input / output $0.016/M/$0.137/M | GPT-5 gpt-5 speed / latency No data input / output $0/M | |
Gemini 2.5 Flash gemini-2.5-flash-preview-04-17 speed / latency No data input / output $0/request | GPT-5 gpt-5-chat-latest speed / latency No data input / output $0/request |
Weighted outcome: GPT-5. Benchmark capability categories carry 80%, while price, API performance, and availability carry 20%.
Output
Input TextImageFile Output Text |
| Features | Text inputImage inputFile inputAudio inputText outputTool callingStructured outputsJSON modeReasoning | Text inputImage inputFile inputText outputTool callingStructured outputsJSON modeReasoning |
|---|
