Claude Sonnet 4.5 vs Kimi K3
Prices checked
Kimi K3 takes 2 of 5 rounds against Claude Sonnet 4.5. It is also the cheaper of the two to run, at $3.02 per million tokens against $5.15.
AnthropicClaude Sonnet 4.5
200k context · tool calling · reads images
$5.15/M tokensCheapest price, at Poe · $2.32 per 1,000 pages
Moonshot AIWins 2 roundsKimi K3
1M context · tool calling · reads images · open weights
$3.02/M tokensCheapest price, at TrustedRouter · $1.01 per 1,000 pages
Maker's price in (lower wins)
$3/M
$3/M
Maker's price out (lower wins)
$15/M
$15/M
Cheapest price (lower wins)
$5.15/M at Poe
$3.02/M at TrustedRouter
Maker's price, blended (lower wins)
$6/M
$6/M
Cost per 1,000 pages (lower wins)
$2.32
$1.01
Context
200k tokens
1M tokens
Open weights
no
yes
Tool calling
yes
yes
Structured output
yes
yes
Reads images
yes
yes
Reasoning
yes
yes
Released
29 Sept 2025
16 Jul 2026
Providers selling it
43
97
Price we measure against
the maker's own
the maker's own
Trains on your prompts (no is better)
not published
not published
Providers selling both · 33
OpenRouter$6 / $2.88
TrustedRouter$6.33 / $3.02
Nous Portal$6 / $4.18
Poe$5.15 / $6.06
FastRouter$6 / $5.40
Jiekou$5.70 / $6
302.AI$6 / $6
Abacus$6 / $6
Claude Sonnet 4.5, then Kimi K3, per million tokens; the 8 cheapest of 33.
Go further
Add a third or fourth model, or change the weighting, in the tool.
What moved this week
Decart · 2% dearer · $1.95 / $9.75 $1.92 / $9.60
Makora · 14% cheaper · $0.50 / $13 $0.65 / $15Melious · 0.6% cheaper ·
$3.18 / $15.89 $3.20 / $15.98
Kenari · 27% dearer · $1.90 / $19 $1.50 / $15
Relace · 1% dearer · $0.22 / $9.72 $0.17 / $9.72
Sail Research · 28% dearer · $0.23 / $11 $1.20 / $5.50
NanoGPT · 287% dearer · $3 / $15 $2 / $0.20- OpenRouter · 9% cheaper · $0.24 / $10.80 $0.24 / $11.94
Inference.net · 9% cheaper · $0.24 / $10.80 $0.24 / $11.94
Merge Gateway · 6% dearer · $3 / $15 $2.90 / $14
Frequently asked
- Which is cheaper, Claude Sonnet 4.5 or Kimi K3?
- Kimi K3, at $3.02 per million tokens against $5.15 for Claude Sonnet 4.5, blended 3 in : 1 out, read on 31 Oct 2026.
- Where is each one cheapest?
- Claude Sonnet 4.5: $5.15 at Poe. Kimi K3: $3.02 at TrustedRouter.
- Can I buy both from one provider?
- Yes. 33 providers sell both: OpenRouter, TrustedRouter, Nous Portal, Poe, FastRouter, Jiekou, and more. The cheapest of them for the two together is OpenRouter.
- Which holds more context?
- Kimi K3, at 1M tokens against 200k.
Prices exclude tax, read 31 Oct 2026 from each provider's own catalog. They are per M tokens, blended 3 in : 1 out, and a page is 600 tokens in and 60 out. Bars are scaled to the larger value in each row.
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