Data points: 116
Model compare
The readout for GPT-5 and Kimi K2.5, 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 61.3 to 38.7.
Evidence depth
116 data points
Includes 25 benchmark rows, 0 audit samples, and 7 provider examples.
Selection signal
Start with GPT-5
The charts below split 32 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 GPT-5 and Kimi K2.5: pricing, speed aggregates, third-party benchmark scores, and shared provider samples.
| Model compare | GPT-5 | Kimi K2.5 |
|---|---|---|
| Overall leader | Leading | Contender |
| Weighted overall score | 61.3 pts | 38.7 pts |
| Benchmark category leads | 4 categories | 2 categories |
| Operational advantages | First-token latency, Free providers | Cheapest input price, Average speed, Provider coverage |
| Context window | 400K tokens | 262.1K tokens |
| Max output | 128K tokens | 262.1K 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 | GPT-5 | Kimi K2.5 |
|---|---|---|
| Developer | OpenAI | MoonshotAI |
| Released | Aug 2025 | Jan 2026 |
| Parameters | No data | No data |
| Tokenizer | GPT | Other |
| Knowledge cutoff | 2024-09-30 | No data |
| OpenRouter ID | openai/gpt-5 | moonshotai/kimi-k2.5 |
| References | No data | No data |
This report only uses LMSpeed data for GPT-5 and Kimi K2.5: pricing, speed aggregates, third-party benchmark scores, and shared provider samples.
GPT-5
GPT-5 is stronger in benchmark categories (Agents, Coding, Knowledge, Math) and operational dimensions (First-token latency, Free providers).
Kimi K2.5
Kimi K2.5 is stronger in benchmark categories (Reasoning, Instruction following) and operational dimensions (Cheapest input price, Average speed, Provider coverage).
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
GPT-5
51.9
Avg. score
Kimi K2.5
49.7
GPT-5 leads by 5.7
GPT-5 leads by 0.5
Kimi K2.5 leads by 4.1
GPT-5 leads by 2.8
GPT-5 leads by 12.4
Kimi K2.5
Kimi K2.5
Kimi K2.5 leads by 1.1
Metric-level scores with benchmark source, rank depth, confidence, error, and evaluation date where available.
GPT-5
$1.25/M
Rank #107/162 · confidence 4
Kimi K2.5
winner$0.600/M
Rank #80/162 · confidence 4
GPT-5
$3.44/M
Rank #117/162 · confidence 4
Kimi K2.5
winner$1.20/M
Rank #85/162 · confidence 4
GPT-5
$10.00/M
Rank #120/162 · confidence 4
Kimi K2.5
winner$3.00/M
Rank #85/162 · confidence 4
GPT-5
winner75.6
Rank #2/89 · confidence 1 · eval date 2025-08-07
Kimi K2.5
65.3
Rank #44/89 · confidence 4 · eval date 2026-02-01
GPT-5
80.6%
Rank #57/125 · confidence 4
Kimi K2.5
winner87.1%
Rank #11/125 · confidence 4 · eval date 2026-02-01
GPT-5
winner5.7
Rank #30/73 · confidence 1 · eval date 2025-08-07
Kimi K2.5
3.1
Rank #41/73 · confidence 4 · eval date 2026-02-01
GPT-5
67.3%
Rank #121/188 · confidence 4
Kimi K2.5
winner78.9%
Rank #79/188 · confidence 4
GPT-5
5.4%
Rank #132/187 · confidence 4
Kimi K2.5
winner12.3%
Rank #84/187 · confidence 4
GPT-5
winner20.1
Rank #22/33 · confidence 1 · eval date 2025-08-07
Kimi K2.5
17.5
Rank #23/33 · confidence 2 · eval date 2026-02-01
GPT-5
42.9
Rank #46/96 · confidence 1 · eval date 2025-08-07
Kimi K2.5
winner49.0
Rank #25/96 · confidence 4 · eval date 2026-02-01
GPT-5
37.8
Rank #41/59 · confidence 1 · eval date 2025-08-07
Kimi K2.5
winner46.8
Rank #35/59 · confidence 4 · eval date 2026-02-01
GPT-5
38.8%
Rank #83/185 · confidence 4
Kimi K2.5
winner39.6%
Rank #76/185 · confidence 4
GPT-5
winner40.7
Rank #20/90 · confidence 1 · eval date 2025-08-07
Kimi K2.5
34.3
Rank #37/90 · confidence 4 · eval date 2026-02-01
GPT-5
26.5
Rank #39/96 · confidence 1 · eval date 2025-08-07
Kimi K2.5
winner29.4
Rank #31/96 · confidence 4 · eval date 2026-02-01
GPT-5
winner82.1
Rank #31/90 · confidence 1 · eval date 2025-08-07
Kimi K2.5
64.6
Rank #58/90 · confidence 4 · eval date 2026-02-01
GPT-5
85.4
Rank #45/96 · confidence 1 · eval date 2025-08-07
Kimi K2.5
winner87.9
Rank #33/96 · confidence 4 · eval date 2026-02-01
GPT-5
34.7
Rank #48/99 · confidence 1 · eval date 2025-08-07
Kimi K2.5
winner35.4
Rank #44/99 · confidence 4 · eval date 2026-02-01
GPT-5
1209.0
Rank #40/66 · confidence 1 · eval date 2025-08-07
Kimi K2.5
winner1275.0
Rank #22/66 · confidence 4 · eval date 2026-02-01
GPT-5
74.2
Rank #32/57 · confidence 1 · eval date 2025-08-07
Kimi K2.5
winner75.4
Rank #25/57 · confidence 4 · eval date 2026-02-01
GPT-5
winner73.1
Rank #29/86 · confidence 1 · eval date 2025-08-07
Kimi K2.5
70.2
Rank #38/86 · confidence 4 · eval date 2026-02-01
GPT-5
84.8
Rank #44/84 · confidence 1 · eval date 2025-08-07
Kimi K2.5
winner95.9
Rank #11/84 · confidence 4 · eval date 2026-02-01
GPT-5
8.5
Rank #20/20 · confidence 1 · eval date 2025-08-07
Kimi K2.5
winner8.7
Rank #19/20 · confidence 4 · eval date 2026-02-01
GPT-5
winner25.7
Rank #28/55 · confidence 1 · eval date 2025-08-07
Kimi K2.5
21.7
Rank #32/55 · confidence 4 · eval date 2026-02-01
GPT-5
winner28.9
Rank #31/50 · confidence 1 · eval date 2025-08-07
Kimi K2.5
25.1
Rank #34/50 · confidence 4 · eval date 2026-02-01
GPT-5
winner1079.0
Rank #31/55 · confidence 1 · eval date 2025-08-07
Kimi K2.5
1003.0
Rank #34/55 · confidence 4 · eval date 2026-02-01
Latest completed audits from shared providers, with four safety and integrity score groups plus report links.
| Provider | GPT-5 | Kimi K2.5 |
|---|---|---|
| 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 | GPT-5 | Kimi K2.5 |
|---|---|---|
30 tests | GPT-5 speed / latency 38 tok/s / 15844ms input / output No data | Kimi K2.5 speed / latency 38 tok/s / 22910ms input / output No data |
20 tests | GPT-5 speed / latency 95 tok/s / 1234ms input / output No data | Kimi K2.5 speed / latency N/A / N/A input / output No data |
10 tests | GPT-5 speed / latency N/A / N/A input / output No data | Kimi K2.5 speed / latency 65 tok/s / 9952ms input / output No data |
5 tests | GPT-5 speed / latency 45 tok/s / 3704ms input / output No data | Kimi K2.5 speed / latency N/A / N/A input / output No data |
5 tests | GPT-5 speed / latency N/A / N/A input / output No data | Kimi K2.5 speed / latency 39 tok/s / 26203ms input / output No data |
GPT-5 gpt-5 speed / latency No data input / output $0/M/$0/M | Kimi K2.5 kimi-k2.5 speed / latency No data input / output $0.031/M | |
GPT-5 gpt-5-all speed / latency No data input / output $0/request | Kimi K2.5 kimi-k2.5 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%.
Input
Output
| Features | Text inputImage inputFile inputText outputTool callingStructured outputsJSON modeReasoning | Text inputImage inputText outputTool callingStructured outputsJSON modeReasoning |
|---|
