Data points: 135
The readout for GPT-5 and Kimi K2, before the detailed comparison sheet.
Decision read
Tie
Tie currently has the stronger profile, with verified wins split 3 to 3.
Evidence depth
135 data points
Includes 34 benchmark rows, 0 audit samples, and 9 provider examples.
Selection signal
Tie
The charts below split 43 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.
Model compare GPT-5 vs Kimi K2gpt-5-vs-kimi-k2 | Model A GPT-5 | Model B Kimi K2 |
|---|---|---|
| Overall leader | Tie | Tie |
| Verified metric wins | 3 wins | 3 wins |
| Where it leads | Cheapest input price, Average speed, Provider coverage | First-token latency, Free providers, Recent tests |
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
61.7
Avg. score
Kimi K2
57.2
Selected category
Instruction following
GPT-5 leads by 31.6
Metric-level scores with benchmark source, rank depth, confidence, error, and evaluation date where available.
GPT-5
winner76.0
Rank #18/81 · confidence 1 · eval date 2025-08-07
Kimi K2
41.0
Rank #53/81 · confidence 1 · eval date 2025-07-01
GPT-5
winner0.89 s
Rank #17/83 · confidence 4
Kimi K2
1.51 s
Rank #27/83 · confidence 4
GPT-5
winner0.89 s
Rank #24/83 · confidence 4
Kimi K2
1.51 s
Rank #41/83 · confidence 4
GPT-5
winner67.8 tok/s
Rank #52/83 · confidence 4
Kimi K2
23.8 tok/s
Rank #82/83 · confidence 4
GPT-5
$10.00/M
Rank #68/96 · confidence 4
Kimi K2
winner$2.50/M
Rank #45/96 · confidence 4
GPT-5
$3.44/M
Rank #66/96 · confidence 4
Kimi K2
winner$1.07/M
Rank #46/96 · confidence 4
GPT-5
$1.25/M
Rank #62/96 · confidence 4
Kimi K2
winner$0.600/M
Rank #46/96 · confidence 4
GPT-5
winner75.6
Rank #2/56 · confidence 1 · eval date 2025-08-07
Kimi K2
51.0
Rank #39/56 · confidence 1 · eval date 2025-07-01
GPT-5
80.6%
Rank #39/74 · confidence 4
Kimi K2
winner81.9%
Rank #34/74 · confidence 4
GPT-5
67.3%
Rank #73/104 · confidence 4
Kimi K2
winner76.7%
Rank #56/104 · confidence 4
GPT-5
5.4%
Rank #73/104 · confidence 4
Kimi K2
winner6.3%
Rank #69/104 · confidence 4
GPT-5
winner42.9
Rank #26/62 · confidence 1 · eval date 2025-08-07
Kimi K2
34.5
Rank #50/62 · confidence 1 · eval date 2025-07-01
GPT-5
55.8%
Rank #37/70 · confidence 4
Kimi K2
winner61.0%
Rank #31/70 · confidence 4
GPT-5
winner32.6
Rank #31/58 · confidence 1 · eval date 2025-08-07
Kimi K2
15.9
Rank #45/58 · confidence 1 · eval date 2025-07-01
GPT-5
winner69.7
Rank #32/68 · confidence 1 · eval date 2025-08-07
Kimi K2
53.4
Rank #41/68 · confidence 1 · eval date 2025-07-01
GPT-5
winner36.0
Rank #33/60 · confidence 1 · eval date 2025-08-07
Kimi K2
22.1
Rank #48/60 · confidence 1 · eval date 2025-07-01
GPT-5
winner38.8%
Rank #53/102 · confidence 4
Kimi K2
30.7%
Rank #81/102 · confidence 4
GPT-5
86.1%
Rank #27/38 · confidence 4
Kimi K2
winner97.1%
Rank #8/38 · confidence 4
GPT-5
36.7%
Rank #20/37 · confidence 4
Kimi K2
winner69.3%
Rank #10/37 · confidence 4
GPT-5
winner70.2
Rank #25/51 · confidence 1 · eval date 2025-08-07
Kimi K2
51.3
Rank #38/51 · confidence 1 · eval date 2025-07-01
GPT-5
winner40.7
Rank #12/57 · confidence 1 · eval date 2025-08-07
Kimi K2
26.8
Rank #31/57 · confidence 1 · eval date 2025-07-01
GPT-5
winner78.9
Rank #18/66 · confidence 1 · eval date 2025-08-07
Kimi K2
56.0
Rank #39/66 · confidence 1 · eval date 2025-07-01
GPT-5
winner26.5
Rank #19/62 · confidence 1 · eval date 2025-08-07
Kimi K2
7.0
Rank #44/62 · confidence 1 · eval date 2025-07-01
GPT-5
winner82.1
Rank #20/57 · confidence 1 · eval date 2025-08-07
Kimi K2
74.2
Rank #34/57 · confidence 1 · eval date 2025-07-01
GPT-5
winner44.6
Rank #23/65 · confidence 1 · eval date 2025-08-07
Kimi K2
26.3
Rank #48/65 · confidence 1 · eval date 2025-07-01
GPT-5
winner85.4
Rank #24/62 · confidence 1 · eval date 2025-08-07
Kimi K2
76.6
Rank #40/62 · confidence 1 · eval date 2025-07-01
GPT-5
winner1230.0
Rank #24/46 · confidence 1 · eval date 2025-08-07
Kimi K2
1096.0
Rank #39/46 · confidence 1 · eval date 2025-07-01
GPT-5
winner73.1
Rank #15/59 · confidence 1 · eval date 2025-08-07
Kimi K2
41.5
Rank #42/59 · confidence 1 · eval date 2025-07-01
GPT-5
80.7
Rank #21/56 · confidence 1 · eval date 2025-08-07
Kimi K2
winner83.5
Rank #19/56 · confidence 1 · eval date 2025-07-01
GPT-5
winner74.8
Rank #16/68 · confidence 1 · eval date 2025-08-07
Kimi K2
30.2
Rank #57/68 · confidence 1 · eval date 2025-07-01
GPT-5
winner84.8
Rank #21/57 · confidence 1 · eval date 2025-08-07
Kimi K2
61.1
Rank #40/57 · confidence 1 · eval date 2025-07-01
GPT-5
winner39.6
Rank #23/51 · confidence 1 · eval date 2025-08-07
Kimi K2
1.2
Rank #51/51 · confidence 1 · eval date 2025-07-01
GPT-5
winner1292.0
Rank #23/56 · confidence 1 · eval date 2025-08-07
Kimi K2
525.0
Rank #51/56 · confidence 1 · eval date 2025-07-01
GPT-5
winner54.6
Rank #26/56 · confidence 1 · eval date 2025-08-07
Kimi K2
24.3
Rank #47/56 · confidence 1 · eval date 2025-07-01
Latest completed audits from shared providers, with four safety and integrity score groups plus report links.
| Provider | GPT-5 | Kimi K2 |
|---|---|---|
| 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 |
|---|---|---|
20 tests | GPT-5 speed / latency 95 tok/s / 1234ms input / output No data | Kimi K2 |
This report only uses LMSpeed data for GPT-5 and Kimi K2: pricing, speed aggregates, third-party benchmark scores, and shared provider samples.
| Guidance | GPT-5 | Kimi K2 |
|---|---|---|
| When to choose each model | GPT-5 GPT-5 is stronger when you prioritize Cheapest input price, Average speed, Provider coverage. | Kimi K2 Kimi K2 is stronger when you prioritize First-token latency, Free providers, Recent tests. |
TL;DR: Tie leads across 135 verifiable data points, including pricing, speed, latency, benchmarks, and provider examples.
Continue from GPT-5 vs Kimi K2 into nearby model comparisons with enough verified LMSpeed data.
| Model metadata | GPT-5 exposes 128K tokens; notable signals: Text input, Image input, File input, Text output. | Kimi K2 exposes 262.1K tokens; notable signals: Text input, Text output, Tool calling, Structured outputs. |
|---|---|---|
| Developer | OpenAI | Moonshot AI |
| Context window | 128K tokens | 262.1K tokens |
| Max output | 16.4K tokens | 262.1K tokens |
| Released | Aug 2025 | Sep 2025 |
| Modalities | Input FileImageText Output Text | Input Text Output Text |
| Features | Text inputImage inputFile inputText outputStructured outputsJSON mode | Text inputText outputTool callingStructured outputsJSON mode |
| Parameters | No data | No data |
| Tokenizer | GPT | Other |
| Knowledge cutoff | 2024-09-30 | 2024-12-31 |
| OpenRouter ID | openai/gpt-5-chat | moonshotai/kimi-k2-0905 |
| References | No data | No data |
speed / latency
N/A / N/A
input / output
No data
EasyMore5 tests | GPT-5 speed / latency 46 tok/s / 6577ms input / output No data | Kimi K2 speed / latency N/A / N/A input / output No data |
|---|
N1N5 tests | GPT-5 speed / latency 102 tok/s / 948ms input / output No data | Kimi K2 speed / latency N/A / N/A input / output No data |
|---|
10dian-API0 tests | GPT-5 speed / latency N/A / N/A input / output No data | Kimi K2 speed / latency N/A / N/A input / output No data |
|---|
933999 API0 tests | GPT-5 speed / latency N/A / N/A input / output No data | Kimi K2 speed / latency N/A / N/A input / output No data |
|---|
GPT-5 gpt-5 speed / latency No data input / output $0.0006/M / $0.0050/M | Kimi K2 kimi-k2-0905 speed / latency No data input / output $0.037/M / $0.037/M |
GPT-5 gpt-5 speed / latency No data input / output $0.0006/M / $0.0050/M | Kimi K2 kimi-k2-0905 speed / latency No data input / output $0.037/M / $0.037/M |
GPT-5 gpt-5-high speed / latency No data input / output $0.0068/M / $0.0068/M | Kimi K2 kimi-k2-0905 speed / latency No data input / output $0.548/M / $2.19/M |
GPT-5 gpt-5-all speed / latency No data input / output $0.0068/M / $0.0068/M | Kimi K2 kimi-k2-250905 speed / latency No data input / output $0.548/M / $2.19/M |
Rankings are based on community-submitted tests and periodic health probes. Advisory only, not official data.
