Anthropic: Claude Opus 5.5 vs MoonshotAI: Kimi K2 0905
MoonshotAI: Kimi K2 0905 is cheaper than Anthropic: Claude Opus 5.5 by about 89% on a blended (75% input / 25% output) basis. Anthropic: Claude Opus 5.5 charges $4.000000 / $20.000000 per 1M input/output tokens; MoonshotAI: Kimi K2 0905 charges $0.500000 / $2.000000.
| Field | Anthropic: Claude Opus 5.5 | MoonshotAI: Kimi K2 0905 |
|---|---|---|
| Input $/Mtok | $4.000000 | $0.500000 |
| Output $/Mtok | $20.000000 | $2.000000 |
| Cache read $/Mtok | $0.200000 | – |
| Cache write $/Mtok | $5.000000 | – |
| Input $/Mchar | n/a | n/a |
| Output $/Mchar | n/a | n/a |
| Context window | 1000000 | 262144 |
| Tokenizer | claude | – |
Price history
Same workload, monthly cost
Illustrative monthly cost at 10M tokens/month, split per workload preset. Not a substitute for the calculator, which uses your own volume, cache and batch assumptions.
| Workload | Anthropic: Claude Opus 5.5 | MoonshotAI: Kimi K2 0905 |
|---|---|---|
| Coding agent | $48.00 | $5.75 |
| RAG chat | $64.00 | $7.25 |
| Summarisation (batch) | $56.00 | $6.50 |
| Classification | $43.20 | $5.30 |
| Chat assistant | $104.00 | $11.00 |
| Content generation | $168.00 | $17.00 |
Cite this page
Anthropic: Claude Opus 5.5 vs MoonshotAI: Kimi K2 0905: $4.000000/$20.000000 vs $0.500000/$2.000000 per 1M tokens, as of 2026-10-04 (Token Barometer, https://tokenbarometer.com/compare/anthropic_claude-opus-5-5-vs-moonshot_kimi-k2).
Anthropic: Claude Opus 5.5 page | MoonshotAI: Kimi K2 0905 page | Open in calculator