GPT-5.4 vs Kimi K3
Cost and capability comparison. For a sample workload of 1,000 input and 500 output tokens across 100,000 requests/month, GPT-5.4 is cheaper by about $50.00/month.
| GPT-5.4 | Kimi K3 | |
|---|---|---|
| Intelligence | ||
| Arena · Overall(LMArena Elo — higher is better) | 1453 | 1473✓ |
| Arena rank (overall) | #26 | #14✓ |
| Arena · Coding | 1386 | 1679✓ |
| Arena · Math & reasoning | 1440✓ | — |
| Arena · Agentic / tool use | 1430✓ | — |
| Score evidence | Measured | Measured |
| Pricing (USD / 1M tokens) | ||
| Input | $2.50✓ | $3.00 |
| Output | $15.00 | $15.00 |
| Cached input (read) | $0.2500✓ | $0.3000 |
| Cache write | — | — |
| Blended(3:1 input:output blend) | $5.63✓ | $6.00 |
| Specs & capabilities | ||
| Provider | OpenAI | Moonshot AI |
| Context window | 1.1M (1,050,000)✓ | 1.0M (1,048,576) |
| Max output | 128,000 | 131,072✓ |
| Modalities | text, image | text |
| Vision | Yes | No |
| Tool use | Yes | Yes |
| Reasoning | Yes | Yes |
| Prompt caching | Yes | Yes |
| Batch pricing | Yes | No |
| Tokenizer | o200k_base | approx |
| Release date | 2026-03 | — |
| Status | ga | ga |
Intelligence scores are community Arena ratings from LMArena / arena.ai, used under CC BY 4.0. Snapshot last refreshed 18 September 2026. Scores are a relative signal, not an absolute measure of capability. A Measured score was voted on directly; an Estimated score is inherited from an identical base model (a regional/creator-prefixed hosting duplicate). See our methodology.
Compare on your own workload
GPT-5.4 and Kimi K3 are pre-loaded. Adjust the tokens and monthly volume to see which is cheaper for your usage.
Used unless you set active users below.
Results update automatically as you type.
| GPT-5.4 | OpenAI | $0.0100 | $1,000.00 | $12,000.00 | 1,050,000 |
| Kimi K3 | Moonshot AI | $0.0105 | $1,050.00 | $12,600.00 | 1,048,576 |
FAQ
Which is cheaper, GPT-5.4 or Kimi K3?
For a workload of 1,000 input and 500 output tokens over 100,000 requests/month, GPT-5.4 is cheaper, costing about $1,000.00/month versus $1,050.00/month.
What is the context window of GPT-5.4 and Kimi K3?
GPT-5.4 supports 1,050,000 tokens, while Kimi K3 supports 1,048,576 tokens.
Estimates for planning only. Verify current pricing with each provider.