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Kimi K2.5 vs Qwen3.5-9B

Complete pricing and performance comparison between Moonshot's Kimi K2.5 and Alibaba's Qwen3.5-9B.

Quick Verdict

Cheaper
Qwen3.5-9B
12.0x cheaper input, 20.0x cheaper output
Larger Context
Qwen3.5-9B
262K vs 128K

Pricing Comparison

SpecKimi K2.5Qwen3.5-9BDifference
ProviderMoonshotAlibaba
Input / 1M tokens$0.6$0.05Qwen3.5-9B is 92% more expensive
Output / 1M tokens$3$0.15Qwen3.5-9B is 95% more expensive
Context Window128K262K2x difference
Max Output33K33K

Performance Benchmarks

MetricKimi K2.5Qwen3.5-9BWinner
Quality Index47--N/A
Output Speed36 tok/s--N/A
Value (Quality/$)78.0--Higher = better value

Benchmark data from Artificial Analysis. Quality Index is a composite score across reasoning, coding, and knowledge tasks.

Cost at Scale

Estimated cost at different usage levels (3:1 input-to-output token ratio, typical for chat).

UsageKimi K2.5Qwen3.5-9BSavings
Single request
1K in / 300 out
$0.0015$0.0001Qwen3.5-9B saves $0.0014
10 requests
10K in / 3K out
$0.015$0.0009Qwen3.5-9B saves $0.014
100 requests
100K in / 30K out
$0.150$0.0095Qwen3.5-9B saves $0.140
1,000 requests
1M in / 300K out
$1.50$0.095Qwen3.5-9B saves $1.41
10,000 requests
10M in / 3M out
$15.00$0.950Qwen3.5-9B saves $14.05
1M requests/mo
1B in / 300M out
$1500.00$95.00Qwen3.5-9B saves $1405.00

Pros & Cons

Kimi K2.5 Strengths

Part of the Moonshot ecosystem

Qwen3.5-9B Strengths

  • +Cheaper input tokens
  • +Cheaper output tokens
  • +Larger context window (262K vs 128K)

When to Use Each Model

Choose Kimi K2.5 for

  • Projects already integrated with Moonshot's ecosystem

Choose Qwen3.5-9B for

  • Budget-conscious projects where cost is the primary factor
  • Long documents, large codebases, or multi-turn conversations

Frequently Asked Questions

Which is cheaper, Kimi K2.5 or Qwen3.5-9B?
For input tokens, Qwen3.5-9B is 12.0x cheaper at $0.05/1M tokens. For output tokens, Qwen3.5-9B is 20.0x cheaper at $0.15/1M tokens. At typical usage (1M input + 300K output), Kimi K2.5 costs $1.50 vs Qwen3.5-9B at $0.095.
What's the context window difference?
Kimi K2.5 supports 128K context (128,000 tokens), while Qwen3.5-9B supports 262K (262,144 tokens). Qwen3.5-9B can handle 2x more context in a single request.
Which model has better benchmarks?
When should I choose Kimi K2.5 over Qwen3.5-9B?
Choose Kimi K2.5 when you need: a Moonshot ecosystem model. Choose Qwen3.5-9B when you need: Cheaper input tokens, Cheaper output tokens, Larger context window (262K vs 128K).
How much would 10,000 API requests cost?
At 1K input + 300 output tokens per request (typical chat): Kimi K2.5 = $15.00, Qwen3.5-9B = $0.950. At 10K input + 1K output per request (longer conversations): Kimi K2.5 = $90.00, Qwen3.5-9B = $6.50.

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