AI model comparison
GPT-5.4 Mini vs Kimi K2.5
Pricing, context window, benchmarks, and features compared side by side. Or skip the guesswork and send one prompt to both.
OpenAI
GPT-5.4 Mini
GPT-5.4 mini brings the core capabilities of GPT-5.4 to a faster, more efficient model optimized for high-throughput workloads.
- Input / 1M
- $0.75
- Output / 1M
- $4.50
- Context
- 400K
Moonshot AI
Kimi K2.5
Kimi K2.5 is Moonshot AI's native multimodal model, delivering state-of-the-art visual coding capability and a self-directed agent swarm paradigm.
- Input / 1M
- $0.50
- Output / 1M
- $2.50
- Context
- 262K
At a glance
Quick verdict
How the two models stack up on the things people ask about most.
Lower price
Kimi K2.5
1.7x cheaper for a typical chat
Higher intelligence score
GPT-5.4 Mini
24.1 vs 23.5 on Artificial Analysis
Larger context window
GPT-5.4 Mini
400K vs 262K tokens
Newer release
GPT-5.4 Mini
Released March 17, 2026
Benchmarks
Benchmark scores
Independent scores from Artificial Analysis. Higher is better.
Intelligence index
GPT-5.4 Mini24.1Coding index
GPT-5.4 Mini56.1Agentic index
GPT-5.4 Mini17.9Pricing
GPT-5.4 Mini vs Kimi K2.5 API pricing
Per-token API rates. Cheaper option highlighted.
| Metric | GPT-5.4 Mini | |
|---|---|---|
| Input tokensPer 1M tokens | $0.75 | $0.50 |
| Output tokensPer 1M tokens | $4.50 | $2.50 |
| Cached input (read)Per 1M tokens | $0.08 | $0.15 |
| Cache writePer 1M tokens | Not available | Not available |
| Web searchPer request | $0.01 | Not available |
What it costs in practice
Estimated cost per 1,000 requests at standard rates. Coding and long-document figures also show the cost when the input is already cached.
Chat message
2K in, 500 out
GPT-5.4 Mini$3.75Coding task
30K in, 4K out
GPT-5.4 Mini$40.50$20.25 cachedLong document summary
150K in, 2K out
GPT-5.4 Mini$121.50$20.25 cachedSpecs
Context window and capabilities
How much each model can read, how much it can write, and what it accepts as input.
| Metric | GPT-5.4 Mini | |
|---|---|---|
| Context window | 400K tokens | 262K tokens |
| Max output | 128K tokens | 236K tokens |
| Input types | File, Image, Text | Image, Text |
| Output types | Text | Text |
| Reasoning effort levels | Extra high, High, Medium, Low, None | Not available |
| Default reasoning effort | Medium | Not available |
| Release date | March 17, 2026 | January 27, 2026 |
Features
Supported features
API features available for each model.
| Metric | GPT-5.4 Mini | |
|---|---|---|
| Tool calling | Supported | Supported |
| Structured outputs | Supported | Supported |
| JSON mode | Supported | Supported |
| Reasoning | Supported | Supported |
| Temperature | Not supported | Supported |
| Stop sequences | Not supported | Supported |
| Deterministic seed | Supported | Supported |
| Verbosity control | Supported | Not supported |
Keep exploring
More on these models
Other head-to-heads, the full model page, and the alternatives list for each model.
GPT-5.4 MiniView full model details- GPT-5.4 Mini vs DeepSeek V4 Flash 0423
- GPT-5.4 Mini vs Gemini 3 Flash Preview
- GPT-5.4 Mini vs GPT-5.2-Codex
- GPT-5.4 Mini vs GLM 5 Turbo
- GPT-5.4 Mini vs Kimi K2.7 Code
- GPT-5.4 Mini vs Inkling
- GPT-5.4 Mini vs Grok 4.3
- GPT-5.4 Mini vs GPT-5.1
- GPT-5.4 Mini vs GPT-5.1-Codex
- GPT-5.4 Mini vs GLM 5V Turbo
- GPT-5.4 Mini vs GPT-5
- GPT-5.4 Mini vs GPT-5 Mini
- GPT-5.4 Mini vs Nemotron 3 Ultra
- GPT-5.4 Mini vs Claude Opus 4.1
- GPT-5.4 Mini vs o3 Pro
- GPT-5.4 Mini vs Qwen3.5 397B A17B
- GPT-5.4 Mini vs GPT-5.1-Codex-Mini
- GPT-5.4 Mini vs o3
- GPT-5.4 Mini vs o4 Mini
- Kimi K2.5 vs DeepSeek V4 Flash 0423
- Kimi K2.5 vs Kimi K2.6
- Kimi K2.5 vs Gemini 3 Flash Preview
- Kimi K2.5 vs Kimi K2.7 Code
- Kimi K2.5 vs Grok 4.20
- Kimi K2.5 vs Grok 4.3
- Kimi K2.5 vs GLM 5V Turbo
- Kimi K2.5 vs Nemotron 3 Ultra
- Kimi K2.5 vs Qwen3.5-27B
- Kimi K2.5 vs Gemini 3.5 Flash Lite
- Kimi K2.5 vs GLM 4.7
- Kimi K2.5 vs Kimi K2 Thinking
Our take
Kimi K2.5 is 1.7x cheaper for a typical chat. GPT-5.4 Mini scores higher on the Artificial Analysis Intelligence Index (24.1 vs 23.5). GPT-5.4 Mini has the larger context window (400K vs 262K tokens). The right pick depends on your workload, so the quickest way to settle it is to send the same prompt to both and compare.
FAQ
Frequently asked questions
Is GPT-5.4 Mini or Kimi K2.5 cheaper?
Kimi K2.5 is cheaper for a typical chat (2K input tokens and 500 output tokens). Kimi K2.5 costs $0.50 per 1M input tokens and $2.50 per 1M output tokens, while GPT-5.4 Mini costs $0.75 per 1M input tokens and $4.50 per 1M output tokens.
Which has a bigger context window, GPT-5.4 Mini or Kimi K2.5?
GPT-5.4 Mini supports up to 400K tokens of context, compared with 262K for Kimi K2.5.
Is GPT-5.4 Mini smarter than Kimi K2.5?
On the Artificial Analysis Intelligence Index, GPT-5.4 Mini scores 24.1 and Kimi K2.5 scores 23.5, putting GPT-5.4 Mini ahead. Benchmarks don't capture everything, so the best test is running your own prompts through both.
Can I use GPT-5.4 Mini and Kimi K2.5 at the same time?
Yes. Shortcut Chat sends one prompt to multiple models at once, so you can see GPT-5.4 Mini and Kimi K2.5 answer side by side and keep the better response.
Why choose? Ask both.
Send one prompt to GPT-5.4 Mini and Kimi K2.5 at the same time. Compare the answers side by side and keep the best one.