AI model comparison
Kimi K2 Thinking vs GPT-5 Mini
Pricing, context window, benchmarks, and features compared side by side. Or skip the guesswork and send one prompt to both.
Moonshot AI
Kimi K2 Thinking
Kimi K2 Thinking is Moonshot AI’s most advanced open reasoning model to date, extending the K2 series into agentic, long-horizon reasoning.
- Input / 1M
- $0.60
- Output / 1M
- $2.50
- Context
- 262K
OpenAI
GPT-5 Mini
GPT-5 Mini is a compact version of GPT-5, designed to handle lighter-weight reasoning tasks.
- Input / 1M
- $0.25
- Output / 1M
- $2
- Context
- 400K
At a glance
Quick verdict
How the two models stack up on the things people ask about most.
Lower price
GPT-5 Mini
1.6x cheaper for a typical chat
Higher intelligence score
Kimi K2 Thinking
22 vs 20.6 on Artificial Analysis
Larger context window
GPT-5 Mini
400K vs 262K tokens
Newer release
Kimi K2 Thinking
Released November 6, 2025
Benchmarks
Benchmark scores
Independent scores from Artificial Analysis. Higher is better.
Intelligence index
GPT-5 Mini20.6Coding index
GPT-5 MiniNot availableAgentic index
GPT-5 MiniNot availablePricing
Kimi K2 Thinking vs GPT-5 Mini API pricing
Per-token API rates. Cheaper option highlighted.
| Metric | GPT-5 Mini | |
|---|---|---|
| Input tokensPer 1M tokens | $0.60 | $0.25 |
| Output tokensPer 1M tokens | $2.50 | $2 |
| Cached input (read)Per 1M tokens | $0.15 | $0.03 |
| Cache writePer 1M tokens | Not available | Not available |
| Web searchPer request | Not available | $0.01 |
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 Mini$1.50Coding task
30K in, 4K out
GPT-5 Mini$15.50$8.75 cachedLong document summary
150K in, 2K out
GPT-5 Mini$41.50$7.75 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 Mini | |
|---|---|---|
| Context window | 262K tokens | 400K tokens |
| Max output | 98K tokens | 128K tokens |
| Input types | Text | File, Image, Text |
| Output types | Text | Text |
| Reasoning effort levels | Not available | High, Medium, Low, Minimal |
| Default reasoning effort | Not available | Medium |
| Release date | November 6, 2025 | August 7, 2025 |
Features
Supported features
API features available for each model.
| Metric | GPT-5 Mini | |
|---|---|---|
| Tool calling | Supported | Supported |
| Structured outputs | Supported | Supported |
| JSON mode | Supported | Supported |
| Reasoning | Supported | Supported |
| Temperature | Supported | Not supported |
| Stop sequences | Supported | Not supported |
| Deterministic seed | Supported | Supported |
| Verbosity control | Not supported | Supported |
Keep exploring
More on these models
Other head-to-heads, the full model page, and the alternatives list for each model.
- Kimi K2 Thinking vs Kimi K2.6
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- Kimi K2 Thinking vs Kimi K2.5
- Kimi K2 Thinking vs Nemotron 3 Ultra
- Kimi K2 Thinking vs Qwen3.5-27B
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- Kimi K2 Thinking vs GLM 4.7
- Kimi K2 Thinking vs Qwen3.5 397B A17B
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GPT-5 MiniView full model details- GPT-5 Mini vs DeepSeek V4 Flash 0423
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- GPT-5 Mini vs Step 3.7 Flash
- GPT-5 Mini vs GPT-5.4 Mini
- GPT-5 Mini vs GPT-5.4 Nano
- GPT-5 Mini vs GPT-5.1-Codex
- GPT-5 Mini vs GPT-5
- GPT-5 Mini vs Nemotron 3 Ultra
- GPT-5 Mini vs GLM 4.7
- GPT-5 Mini vs o3 Pro
- GPT-5 Mini vs Qwen3.5 397B A17B
- GPT-5 Mini vs Qwen3.6 27B
- GPT-5 Mini vs MiniMax M2.1
- GPT-5 Mini vs GPT-5.1-Codex-Mini
- GPT-5 Mini vs o3
- GPT-5 Mini vs LongCat 2.0
- GPT-5 Mini vs GLM 4.6
- GPT-5 Mini vs Qwen3.5-122B-A10B
- GPT-5 Mini vs o4 Mini
Our take
GPT-5 Mini is 1.6x cheaper for a typical chat. Kimi K2 Thinking scores higher on the Artificial Analysis Intelligence Index (22 vs 20.6). GPT-5 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 Kimi K2 Thinking or GPT-5 Mini cheaper?
GPT-5 Mini is cheaper for a typical chat (2K input tokens and 500 output tokens). GPT-5 Mini costs $0.25 per 1M input tokens and $2 per 1M output tokens, while Kimi K2 Thinking costs $0.60 per 1M input tokens and $2.50 per 1M output tokens.
Which has a bigger context window, Kimi K2 Thinking or GPT-5 Mini?
GPT-5 Mini supports up to 400K tokens of context, compared with 262K for Kimi K2 Thinking.
Is Kimi K2 Thinking smarter than GPT-5 Mini?
On the Artificial Analysis Intelligence Index, Kimi K2 Thinking scores 22 and GPT-5 Mini scores 20.6, putting Kimi K2 Thinking ahead. Benchmarks don't capture everything, so the best test is running your own prompts through both.
Can I use Kimi K2 Thinking and GPT-5 Mini at the same time?
Yes. Shortcut Chat sends one prompt to multiple models at once, so you can see Kimi K2 Thinking and GPT-5 Mini answer side by side and keep the better response.
Why choose? Ask both.
Send one prompt to Kimi K2 Thinking and GPT-5 Mini at the same time. Compare the answers side by side and keep the best one.