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Model comparison

GLM-4.5-Air vs Kimi K3

Price in rupees, context and benchmarks side by side; same key, a one-string switch.

Input price per 1M
₹2.95 ($0.030)
₹29.87 ($0.304)
Output price per 1M
₹13.76 ($0.140)
₹1,173 ($11.94)
Context window
131K tokens
1M tokens
Max output
98K tokens
1M tokens
Input types
text
text, image, video
Capabilities
tools, reasoning
tools, JSON, vision, reasoning
Author
Z.ai
Moonshot
LMArena Overall
1384
1476
LMArena Coding
1397
1508
LMArena Math
1396
1494
LMArena Creative writing
1343
1457
LMArena Instruction following
1354
1485
LMArena Hard prompts
1379
1495
LMArena Web dev
—
1655
GPQA Diamond
—
93.1%
OTIS Mock AIME
—
97.2%
SimpleQA Verified
—
50.6%
Humanity's Last Exam
8.1%
—

Scores from LMArena and Epoch AI, as published; a blank cell means not measured there.

What a month costs on each

Chatbot month (15M in, 4M out)
₹99.23
₹5,139
RAG month (40M in, 3M out)
₹159
₹4,713
Coding month (60M in, 10M out)
₹314
₹13,519

On a typical 75/25 input-output mix, GLM-4.5-Air costs less (about 98% less than Kimi K3). Kimi K3 takes the longer prompt at 1M tokens. Try your own numbers in the cost calculator.

Call either one

curl
curl https://rapidrouter.ai/api/v1/chat/completions \
  -H "Authorization: Bearer $RAPIDROUTER_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"model": "z-ai/glm-4.5-air", "messages": [{"role": "user", "content": "Hello"}]}'

# the other one: change the model string
  -d '{"model": "moonshotai/kimi-k3", ...}'

Common questions

Which is cheaper, GLM-4.5-Air or Kimi K3?

GLM-4.5-Air is cheaper on a typical mix of 75% input and 25% output tokens, by about 98%. Through Rapid Router both are billed at the provider list price per million tokens, in rupees.

Which has the larger context window?

Kimi K3, at 1M tokens. GLM-4.5-Air offers 131K tokens.

Can I switch between GLM-4.5-Air and Kimi K3 without changing code?

Yes. Both are callable at https://rapidrouter.ai/api/v1 with the same OpenAI-compatible request; only the model string changes (z-ai/glm-4.5-air or moonshotai/kimi-k3).

How do I pay for GLM-4.5-Air or Kimi K3 in India?

Top up a Rapid Router balance with UPI or a card in rupees, get a GST invoice on every recharge, and both models debit that balance per request.