Data points: 83
The readout for GPT-OSS and Kimi K2.5, before the detailed comparison sheet.
Decision read
GPT-OSS
GPT-OSS currently has the stronger profile, with verified wins split 4 to 2.
Evidence depth
83 data points
Includes 8 benchmark rows, 0 audit samples, and 8 provider examples.
Selection signal
Start with GPT-OSS
The charts below split 16 high-signal samples across speed, scores, and audit health.
Model compare GPT-OSS vs Kimi K2.5gpt-oss-vs-kimi-k2-5 | Model A GPT-OSS | Model B Kimi K2.5 |
|---|---|---|
| Overall leader | Leading | Contender |
| Verified metric wins | 4 wins | 2 wins |
| Where it leads | Average speed, First-token latency, Free providers, Recent tests |
Third-party benchmark profile synced into LMSpeed; only metrics available for both models are shown.
| Metric | GPT-OSS | Kimi K2.5 |
|---|---|---|
| Output price | $0.200/M#3 |
Latest completed audits from shared providers, with four safety and integrity score groups plus report links.
| Provider | GPT-OSS | 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-OSS | Kimi K2.5 |
|---|---|---|
125 tests | GPT-OSS speed / latency 154 tok/s / 963ms input / output No data |
This report only uses LMSpeed data for GPT-OSS and Kimi K2.5: pricing, speed aggregates, third-party benchmark scores, and shared provider samples.
| Guidance | GPT-OSS | Kimi K2.5 |
|---|---|---|
| When to choose each model | GPT-OSS GPT-OSS is stronger when you prioritize Average speed, First-token latency, Free providers, Recent tests. | Kimi K2.5 Kimi K2.5 is stronger when you prioritize Cheapest input price, Provider coverage. |
TL;DR: GPT-OSS leads across 83 verifiable data points, including pricing, speed, latency, benchmarks, and provider examples.
Continue from GPT-OSS vs Kimi K2.5 into nearby model comparisons with enough verified LMSpeed data.
| Cheapest input price, Provider coverage |
| Model metadata | GPT-OSS exposes 131.1K tokens; notable signals: Text input, Text output, Tool calling, Reasoning. | Kimi K2.5 exposes 262.1K tokens; notable signals: Text input, Image input, Text output, Tool calling. |
|---|---|---|
| Developer | No data | Moonshot AI |
| Context window | 131.1K tokens | 262.1K tokens |
| Max output | 131.1K tokens | 262.1K tokens |
| Released | Aug 2025 | Jan 2026 |
| Modalities | Input Text Output Text | Input TextImage Output Text |
| Features | Text inputText outputTool callingReasoning | Text inputImage inputText outputTool callingStructured outputsJSON modeReasoning |
| Parameters | 120B | No data |
| Tokenizer | GPT | Other |
| Knowledge cutoff | 2024-06-30 | No data |
| OpenRouter ID | openai/gpt-oss-120b:free | moonshotai/kimi-k2.5 |
| References | No data | No data |
| Blended price | $0.095/M#4 | $1.19/M#43 |
|---|
| Input price | $0.060/M#4 | $0.580/M#21 |
|---|
| Output speed | 243.2 tok/s#6 | 47.1 tok/s#93 |
|---|
| Time to first token | 0.50 s#10 | 1.27 s#49 |
|---|
| HLE | 5.1%#86 | 29.4%#14 |
|---|
| SciCode | 34.0%#79 | 49.0%#14 |
|---|
| GPQA | 61.1%#102 | 87.9%#16 |
|---|
Kimi K2.5
speed / latency
48 tok/s / 18528ms
input / output
No data
星见雅 API45 tests | GPT-OSS speed / latency 164 tok/s / 1247ms input / output No data | Kimi K2.5 speed / latency 38 tok/s / 22910ms input / output No data |
|---|
OpenRouter40 tests | GPT-OSS speed / latency 41 tok/s / 2851ms input / output No data | Kimi K2.5 speed / latency N/A / N/A input / output No data |
|---|
素墨API35 tests | GPT-OSS speed / latency 347 tok/s / 2670ms input / output No data | Kimi K2.5 speed / latency N/A / N/A input / output No data |
|---|
Rnglg2 API20 tests | GPT-OSS speed / latency 338 tok/s / 2317ms input / output No data | Kimi K2.5 speed / latency N/A / N/A input / output No data |
|---|
GPT-OSS openai/gpt-oss-20b speed / latency No data input / output $0/M / $0/M | Kimi K2.5 官网反代/kimi-k2.5 speed / latency No data input / output $75.00/M / $75.00/M |
GPT-OSS openai/gpt-oss-20b speed / latency No data input / output $0/M / $0/M | Kimi K2.5 官网反代/kimi-k2.5 speed / latency No data input / output $75.00/M / $75.00/M |
GPT-OSS gpt-oss-120b speed / latency No data input / output $0/M / $0/M | Kimi K2.5 kimi-k2.5 speed / latency No data input / output $0/M / $0/M |
Rankings are based on community-submitted tests and periodic health probes. Advisory only, not official data.
