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Kimi K3.1 Pro vs Grok 4.7

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
Kimi K3.1 ProMoonshotAImoonshotai/kimi-k3.1-pro
Grok 4.7xAIx-ai/grok-4.7
Creator
MoonshotAI
xAI
Released
Oct 23, 2026
Sep 21, 2026
Context window
1.05M (best)
500K
Max output
1.05M (best)
500K
Input / 1MLowest provider price
$2.00
$2.00
Output / 1MLowest provider price
$10.00
$6.00 (best)
Providers
1
1
IntelligenceArtificial Analysis index
46.0 (best)
35.0
Accepts
Text, Image
Text, Image
Produces
Text
Text
Tool calling
Yes
Yes
Structured output
Yes
Yes
Reasoning
No
No

Kimi K3.1 Pro vs Grok 4.7: summary

Kimi K3.1 Pro and Grok 4.7 are both available through FastRouter's OpenAI-compatible API, so switching between them is a change of model id, not a new integration.

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.

Grok 4.7, from xAI, has a 500,000-token context window, costs $2.00/1M input and $6.00/1M output tokens and scores 35.0 on the Artificial Analysis Intelligence Index.

Kimi K3.1 Pro has the largest context window 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="moonshotai/kimi-k3.1-pro", messages=[...]) # or client.chat.completions.create(model="x-ai/grok-4.7", messages=[...])
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Benchmark scores sourced from ArtificialAnalysis