GPT-5 vs Kimi K2 for react: which is better in 2026?
A head-to-head look at GPT-5 and Kimi K2 for react. Benchmarks via artificialanalysis.ai, pricing as of May 2026. Compare AI models like these inside Admix.
Quick verdict
For react in May 2026, GPT-5 edges out Kimi K2 on the codingIndex metric. Strong at explaining hook rules and reconciler behavior.
Side-by-side specs
| Spec | GPT-5 | Kimi |
|---|---|---|
| Intelligence index | 78.4 | 70.4 |
| Coding index | 76.1 | 68.9 |
| Context window | 400K tokens | 2M tokens |
| Speed (tok/s) | 142 | 110 |
| Input $/M | $5.00 | $0.60 |
| Output $/M | $20.00 | $2.50 |
| Released | Aug 7, 2025 | Dec 11, 2025 |
How they handle react
GPT-5: Strong at explaining hook rules and reconciler behavior.
Kimi K2: Huge context window at low price. The main caveat is coding lags western frontier models.
Cost per 1,000 queries
Assuming 1,500 input and 800 output tokens per query:
- GPT-5: $23.50 per 1,000 queries
- Kimi K2: $2.90 per 1,000 queries
Verdict by sub-task
- Best raw quality on react:
- Best price: Kimi K2
- Longest context: Kimi K2
- Fastest: GPT-5
FAQ
Is GPT-5 better than Kimi K2 for react?
On May 2026 benchmarks (artificialanalysis.ai), GPT-5 ranks higher than Kimi K2 for react on the codingIndex metric. The gap is small enough that the choice often comes down to price, context length, and tone.
Which is cheaper, GPT-5 or Kimi K2?
GPT-5 costs $5.00 input and $20.00 output per million tokens. Kimi K2 costs $0.60 input and $2.50 output per million tokens.
Can I use both GPT-5 and Kimi in one app?
Yes. Admix is a multi model AI chat aggregator that lets you run GPT-5 and Kimi K2 side by side under one subscription.
Sources
Benchmarks from artificialanalysis.ai (May 2026).
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