MiniMax M3.1 Flash 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
MiniMax M3.1 FlashMinimaxminimax/minimax-m3.1-flash
Kimi K3.1 ProMoonshotAImoonshotai/kimi-k3.1-pro
Creator
Minimax
MoonshotAI
Released
Oct 19, 2026
Oct 23, 2026
Context window
1M
1.05M (best)
Max output
524K
1.05M (best)
Input / 1MLowest provider price
$0.15 (best)
$2.00
Output / 1MLowest provider price
$0.60 (best)
$10.00
Providers
1
1
IntelligenceArtificial Analysis index
28.9
46.0 (best)
Accepts
Text, Image, Video
Text, Image
Produces
Text
Text
Tool calling
Yes
Yes
Structured output
Yes
Yes
Reasoning
Yes
No

MiniMax M3.1 Flash vs Kimi K3.1 Pro: summary

MiniMax M3.1 Flash 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.

MiniMax M3.1 Flash, from Minimax, has a 1,000,000-token context window, costs $0.15/1M input and $0.60/1M output tokens and scores 28.9 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.

MiniMax M3.1 Flash is the cheapest on input, 13× cheaper than the next model, 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="minimax/minimax-m3.1-flash", messages=[...]) # or client.chat.completions.create(model="moonshotai/kimi-k3.1-pro", messages=[...])
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Benchmark scores sourced from ArtificialAnalysis