Model comparison
Kimi K2 0905 vs Kimi K2.5
Price history, scores and specs for both models, line by line. Every value shows where it came from and when we last confirmed it.
Moonshotai
Kimi K2 0905
Kimi K2 0905 is the September update of Kimi K2 0711.
Moonshotai
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.
Quick take
Where each one leads
- Kimi K2.5 costs less to send text to: $0.532 per million tokens, against $0.600 per million tokens for Kimi K2 0905.
- Kimi K2 0905 costs less per word it writes: $2.50 per million tokens, against $3.33 per million tokens for Kimi K2.5.
- Kimi K2.5 scores higher on the Artificial Analysis Intelligence Index: 23.5 to 15.3.
- More people run Kimi K2.5 through OpenRouter than Kimi K2 0905 right now.
Each line comes from a checked value in the tables below. Pick on your workload: price and usage matter for high volume, context and scores for long documents and agent loops.
Price history
Prices side by side, day by day
- Kimi K2 0905
- Kimi K2.5
- Kimi K2 0905
- Kimi K2.5
Prices are the listed OpenRouter base rates in US dollars. A day we could not confirm is left out of the line, never filled in.
Price
What each one costs now
| Measure | Kimi K2 0905 | Kimi K2.5 |
|---|---|---|
| Input price | $0.600 per million tokens | $0.532 per million tokens Leads |
| Output price | $2.50 per million tokens Leads | $3.33 per million tokens |
Scores
Benchmarks, with source and date
| Measure | Kimi K2 0905 | Kimi K2.5 |
|---|---|---|
| Artificial Analysis Intelligence Index | 15.3 | 23.5 Leads |
| Artificial Analysis Coding Index | Not checked yet | 46.8 |
| LMArena text rating (Elo) | Not checked yet | 1,445 |
| LMArena web development rating (Elo) | Not checked yet | 1,436 |
| LMArena vision rating (Elo) | Not checked yet | 1,269 |
| Design Arena rating (Elo) | 1,103 | 1,245 Leads |
Specs
Context, modalities and tool use
| Measure | Kimi K2 0905 | Kimi K2.5 |
|---|---|---|
| Context window | 262,144 tokens | 262,144 tokens |
| Reads | Text | Text, Images |
| Writes | Text | Text |
| Tool calling | Yes | Yes |
| Reasoning mode | No | Yes |
| Open weights | Yes | Yes |
| Listed since | 4 Sept 2025 | 27 Jan 2026 |
Usage
How much each one is used
| Measure | Kimi K2 0905 | Kimi K2.5 |
|---|---|---|
| Tokens served on OpenRouter in a day | 492.6M (for 10 Nov 2026) | 3.8B Leads (for 10 Nov 2026) |
| Requests on OpenRouter in a day | 143.1K (for 10 Nov 2026) | 261.6K Leads (for 10 Nov 2026) |
| Tool calls on OpenRouter in a day | 4.6K (for 10 Nov 2026) | 46.7K Leads (for 10 Nov 2026) |
| Token usage, last 7 days | Down 1% on the week before (for 10 Nov 2026) | Up 5% on the week before Leads (for 10 Nov 2026) |
- Kimi K2 0905
- Kimi K2.5
How this works
One link, either order
This link stays the same whichever order you name the two models in, so you can share it as it is. A line appears only when at least one model has a value we confirmed from a source; values we have not confirmed are left out, never guessed. To add a third record of any type, use the open comparison. Read how we check facts.