Data points: 81
The readout for GPT-5.4 and Kimi K2.5, before the detailed comparison sheet.
Decision read
Tie
Tie currently has the stronger profile, with verified wins split 3 to 3.
Evidence depth
81 data points
Includes 8 benchmark rows, 0 audit samples, and 9 provider examples.
Selection signal
Tie
The charts below split 17 high-signal samples across speed, scores, and audit health.
Model compare GPT-5.4 vs Kimi K2.5gpt-5-4-vs-kimi-k2-5 | Model A GPT-5.4 | Model B Kimi K2.5 |
|---|---|---|
| Overall leader | Tie | Tie |
| Verified metric wins | 3 wins | 3 wins |
| Where it leads | First-token latency, Provider coverage, Recent tests | Cheapest input price, Average speed, Free providers |
| Model metadata | GPT-5.4 exposes 1.1M 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 | 1.1M tokens | 262.1K tokens |
| Max output | 128K tokens | 262.1K tokens |
| Released | Mar 2026 | Jan 2026 |
| Modalities | Input TextImageFile Output Text | Input TextImage Output Text |
| Features | Text inputImage inputFile inputText outputTool callingStructured outputsJSON modeReasoning | Text inputImage inputText outputTool callingStructured outputsJSON modeReasoning |
| Parameters | No data | No data |
| Tokenizer | GPT | Other |
| Knowledge cutoff | No data | No data |
| OpenRouter ID | openai/gpt-5.4 | moonshotai/kimi-k2.5 |
| References | No data | No data |
Third-party benchmark profile synced into LMSpeed; only metrics available for both models are shown.
| Metric | GPT-5.4 | Kimi K2.5 |
|---|---|---|
| GPQA | 92.0%#3 | 87.9%#16 |
| SciCode | 56.6%#3 | 49.0%#14 |
| HLE | 41.6%#4 | 29.4%#14 |
| Input price | $2.50/M#37 | $0.580/M#21 |
| Output price | $15.00/M#44 | $3.00/M#28 |
| Blended price | $5.63/M#63 | $1.19/M#43 |
| Time to first token | 134.24 s#110 | 1.27 s#49 |
| Output speed | 92.4 tok/s#56 | 47.1 tok/s#93 |
Latest completed audits from shared providers, with four safety and integrity score groups plus report links.
| Provider | GPT-5.4 | 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-5.4 | Kimi K2.5 |
|---|---|---|
天宫造物50 tests | GPT-5.4 speed / latency 50 tok/s / 7305ms input / output No data | Kimi K2.5 speed / latency N/A / N/A input / output No data |
星见雅 API45 tests | GPT-5.4 speed / latency 49 tok/s / 5435ms input / output No data | Kimi K2.5 speed / latency 38 tok/s / 22910ms input / output No data |
巨量API44 tests | GPT-5.4 speed / latency 43 tok/s / 12778ms input / output No data | Kimi K2.5 speed / latency 44 tok/s / 883ms input / output No data |
6345ywz API15 tests | GPT-5.4 speed / latency 41 tok/s / 6581ms input / output No data | Kimi K2.5 speed / latency N/A / N/A input / output No data |
Thorbase15 tests | GPT-5.4 speed / latency N/A / N/A input / output No data | Kimi K2.5 speed / latency 40 tok/s / 10596ms input / output No data |
GPT-5.4 gpt-5.4-free speed / latency No data input / output $0/M / $0/M | Kimi K2.5 kimi-k2.5 speed / latency No data input / output $1.12/M / $5.87/M | |
GPT-5.4 gpt-5.4 speed / latency No data input / output $0.342/M / $2.05/M | Kimi K2.5 kimi-k2.5-20260127 speed / latency No data input / output $0.0021/M / $0.0021/M | |
GPT-5.4 gpt-5.4-high speed / latency No data input / output $0.050/M / $0.050/M | Kimi K2.5 kimi-k2.5 speed / latency No data input / output $0.010/M / $0.010/M | |
GPT-5.4 gpt-5.4 speed / latency No data input / output $0.014/M / $0.085/M | Kimi K2.5 kimi-k2.5 speed / latency No data input / output $0.010/M / $0.058/M |
This report only uses LMSpeed data for GPT-5.4 and Kimi K2.5: pricing, speed aggregates, third-party benchmark scores, and shared provider samples.
| Guidance | GPT-5.4 | Kimi K2.5 |
|---|---|---|
| When to choose each model | GPT-5.4 GPT-5.4 is stronger when you prioritize First-token latency, Provider coverage, Recent tests. | Kimi K2.5 Kimi K2.5 is stronger when you prioritize Cheapest input price, Average speed, Free providers. |
TL;DR: Tie leads across 81 verifiable data points, including pricing, speed, latency, benchmarks, and provider examples.
Continue from GPT-5.4 vs Kimi K2.5 into nearby model comparisons with enough verified LMSpeed data.
Rankings are based on community-submitted tests and periodic health probes. Advisory only, not official data.
