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DeepSeek V4 Pro vs Kimi K3.1 Pro

Side-by-side pricing per provider, context window, benchmark scores and speed, all on one OpenAI-compatible API.

Estimate monthly cost for these models
Metric
DeepSeek V4 ProDeepSeekdeepseek/deepseek-v4-pro
Kimi K3.1 ProMoonshotAImoonshotai/kimi-k3.1-pro
Creator
DeepSeek
MoonshotAI
Released
Apr 24, 2026
Oct 23, 2026
Context window
1.05M
1.05M
Max output
384K
1.05M (best)
Input / 1MLowest provider price
$1.74$1.74–$2.40 across 3 (best)
$2.00
Output / 1MLowest provider price
$3.48$3.48–$4.80 across 3 (best)
$10.00
Providers
3 (best)
1
IntelligenceArtificial Analysis index
23.1
46.0 (best)
LatencyMedian time to first token
4.9s
—
ThroughputMedian tokens per second
<1 t/s
—
Accepts
Text
Text, Image
Produces
Text
Text
Tool calling
Yes
Yes
Structured output
Yes
Yes
Reasoning
Yes
No

DeepSeek V4 Pro vs Kimi K3.1 Pro: summary

DeepSeek V4 Pro and Kimi K3.1 Pro are both available through FastRouter's OpenAI-compatible API, so switching between them is a change of model id, not a new integration.

DeepSeek V4 Pro, from DeepSeek, has a 1,048,576-token context window, costs from $1.74/1M input and $3.48/1M output tokens across 3 providers and scores 23.1 on the Artificial Analysis Intelligence Index.

Kimi K3.1 Pro, from MoonshotAI, has a 1,048,576-token context window, costs $2.00/1M input and $10.00/1M output tokens and scores 46.0 on the Artificial Analysis Intelligence Index.

DeepSeek V4 Pro is the cheapest on input, 1.1× cheaper than the next model and Kimi K3.1 Pro scores highest for intelligence.

Switch with one line

client = OpenAI(base_url="https://api.fastrouter.ai/api/v1", api_key="<FASTROUTER_API_KEY>") client.chat.completions.create(model="deepseek/deepseek-v4-pro", messages=[...]) # or client.chat.completions.create(model="moonshotai/kimi-k3.1-pro", messages=[...])
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Benchmark scores sourced from ArtificialAnalysis