Data points: 82
The readout for GPT-5 and Kimi K2 Thinking, before the detailed comparison sheet.
Decision read
GPT-5
GPT-5 currently has the stronger profile, with verified wins split 4 to 2.
Evidence depth
82 data points
Includes 8 benchmark rows, 0 audit samples, and 9 provider examples.
Selection signal
Start with GPT-5
The charts below split 17 high-signal samples across speed, scores, and audit health.
Model compare GPT-5 vs Kimi K2 Thinkinggpt-5-vs-kimi-k2-thinking | Model A GPT-5 | Model B Kimi K2 Thinking |
|---|---|---|
| Overall leader | Leading | Contender |
| Verified metric wins | 4 wins | 2 wins |
| Where it leads | Cheapest input price, Average speed, First-token latency, Provider coverage |
Third-party benchmark profile synced into LMSpeed; only metrics available for both models are shown.
| Metric | GPT-5 | Kimi K2 Thinking |
|---|---|---|
| MMLU-Pro | 87.1%#7 |
Latest completed audits from shared providers, with four safety and integrity score groups plus report links.
| Provider | GPT-5 | Kimi K2 Thinking |
|---|---|---|
| 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 Thinking |
|---|---|---|
5 tests | GPT-5 speed / latency 46 tok/s / 6577ms input / output No data |
This report only uses LMSpeed data for GPT-5 and Kimi K2 Thinking: pricing, speed aggregates, third-party benchmark scores, and shared provider samples.
| Guidance | GPT-5 | Kimi K2 Thinking |
|---|---|---|
| When to choose each model | GPT-5 GPT-5 is stronger when you prioritize Cheapest input price, Average speed, First-token latency, Provider coverage. | Kimi K2 Thinking Kimi K2 Thinking is stronger when you prioritize Free providers, Recent tests. |
TL;DR: GPT-5 leads across 82 verifiable data points, including pricing, speed, latency, benchmarks, and provider examples.
Continue from GPT-5 vs Kimi K2 Thinking into nearby model comparisons with enough verified LMSpeed data.
| Free providers, Recent tests |
| Model metadata | GPT-5 exposes 128K tokens; notable signals: Text input, Image input, File input, Text output. | Kimi K2 Thinking 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 | Nov 2025 |
| Modalities | Input FileImageText Output Text | Input Text Output Text |
| Features | Text inputImage inputFile inputText outputStructured outputsJSON mode | Text 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-thinking |
| References | No data | No data |
| LiveCodeBench | 84.6%#11 | 85.3%#9 |
|---|
| Input price | $1.25/M#30 | $0.600/M#23 |
|---|
| HLE | 26.5%#24 | 22.3%#35 |
|---|
| Output price | $10.00/M#41 | $2.50/M#27 |
|---|
| GPQA | 85.4%#31 | 83.8%#39 |
|---|
| SciCode | 42.9%#31 | 42.4%#35 |
|---|
| Time to first token | 62.85 s#104 | 0.93 s#33 |
|---|
Kimi K2 Thinking
speed / latency
N/A / N/A
input / output
No data
WONG公益站5 tests | GPT-5 speed / latency N/A / N/A input / output No data | Kimi K2 Thinking speed / latency 45 tok/s / 7512ms input / output No data |
|---|
星见雅 API5 tests | GPT-5 speed / latency 38 tok/s / 15844ms input / output No data | Kimi K2 Thinking 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 Thinking speed / latency N/A / N/A input / output No data |
|---|
6345ywz API0 tests | GPT-5 speed / latency N/A / N/A input / output No data | Kimi K2 Thinking 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 Thinking kimi-k2-thinking 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 Thinking kimi-k2-thinking 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 Thinking kimi-k2-thinking 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 Thinking kimi-k2-thinking 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.
