Data points: 82
The readout for GPT-5 and Kimi K2.5, before the detailed comparison sheet.
Decision read
Kimi K2.5
Kimi K2.5 currently has the stronger profile, with verified wins split 2 to 4.
Evidence depth
82 data points
Includes 8 benchmark rows, 0 audit samples, and 9 provider examples.
Selection signal
Start with Kimi K2.5
The charts below split 17 high-signal samples across speed, scores, and audit health.
Model compare GPT-5 vs Kimi K2.5gpt-5-vs-kimi-k2-5 | Model A GPT-5 | Model B Kimi K2.5 |
|---|---|---|
| Overall leader | Contender | Leading |
| Verified metric wins | 2 wins | 4 wins |
| Where it leads | Cheapest input price, First-token latency | Average speed, Free providers, Provider coverage, Recent tests |
Third-party benchmark profile synced into LMSpeed; only metrics available for both models are shown.
| Metric | GPT-5 | Kimi K2.5 |
|---|---|---|
| HLE | 26.5%#24 |
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 |
This report only uses LMSpeed data for GPT-5 and Kimi K2.5: pricing, speed aggregates, third-party benchmark scores, and shared provider samples.
| Guidance | GPT-5 | Kimi K2.5 |
|---|---|---|
| When to choose each model | GPT-5 GPT-5 is stronger when you prioritize Cheapest input price, First-token latency. | Kimi K2.5 Kimi K2.5 is stronger when you prioritize Average speed, Free providers, Provider coverage, Recent tests. |
TL;DR: Kimi K2.5 leads across 82 verifiable data points, including pricing, speed, latency, benchmarks, and provider examples.
Continue from GPT-5 vs Kimi K2.5 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 K2.5 exposes 262.1K tokens; notable signals: Text input, Image input, Text output, Tool calling. |
|---|---|---|
| Developer | OpenAI | Moonshot AI |
| Context window | 128K tokens | 262.1K tokens |
| Max output | 16.4K tokens | 262.1K tokens |
| Released | Aug 2025 | Jan 2026 |
| Modalities | Input FileImageText Output Text | Input TextImage Output Text |
| Features | Text inputImage inputFile inputText outputStructured outputsJSON mode | Text inputImage inputText outputTool callingStructured outputsJSON modeReasoning |
| Parameters | No data | No data |
| Tokenizer | GPT | Other |
| Knowledge cutoff | 2024-09-30 | No data |
| OpenRouter ID | openai/gpt-5-chat | moonshotai/kimi-k2.5 |
| References | No data | No data |
| SciCode | 42.9%#31 | 49.0%#14 |
|---|
| GPQA | 85.4%#31 | 87.9%#16 |
|---|
| Input price | $1.25/M#30 | $0.580/M#21 |
|---|
| Output price | $10.00/M#41 | $3.00/M#28 |
|---|
| Blended price | $3.44/M#58 | $1.19/M#43 |
|---|
| Output speed | 109.6 tok/s#44 | 47.1 tok/s#93 |
|---|
| Time to first token | 62.85 s#104 | 1.27 s#49 |
|---|
speed / latency
38 tok/s / 22910ms
input / output
No data
V-API20 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 |
|---|
TradingBase API10 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 |
|---|
CookingAI5 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 |
|---|
EasyMore5 tests | GPT-5 speed / latency 46 tok/s / 6577ms input / output No data | Kimi K2.5 speed / latency N/A / N/A input / output No data |
|---|
GPT-5 gpt-5-high speed / latency No data input / output $0.0068/M / $0.0068/M | Kimi K2.5 kimi-k2.5 speed / latency No data input / output $0.548/M / $3.01/M |
GPT-5 gpt-5-all speed / latency No data input / output $0.0068/M / $0.0068/M | Kimi K2.5 kimi-k2.5 speed / latency No data input / output $0.548/M / $2.88/M |
GPT-5 gpt-5-all speed / latency No data input / output $0.0068/M / $0.0068/M | Kimi K2.5 kimi-k2.5 speed / latency No data input / output $0.548/M / $2.88/M |
GPT-5 gpt-5 speed / latency No data input / output $1.35/M / $10.80/M | Kimi K2.5 kimi-k2.5 speed / latency No data input / output $0.010/M / $0.010/M |
Rankings are based on community-submitted tests and periodic health probes. Advisory only, not official data.
