Gemini 3.1 Pro preview vs Mistral Large latest

Gemini 3.1 Pro preview vs Mistral Large latest: Mistral Large latest is cheaper by 50% on average. Gemini 3.1 Pro preview from Google Vertex AI (1,048,576-token context, reasoning, tool calls) vs. Mistral Large latest from Google Vertex AI (128,000-token context, tool calls). Use Agent Command Center to A/B both in shadow mode and pick the winner per workload.

Side-by-side cost

Live workload comparison

Same workload run through both models. The cheaper one is highlighted.

3,000
01,048,576
400
065,536
5,000
01,000,000
Google Vertex AI
$1,644/mo
Input $2.00/M · Output $12.00/M
Google Vertex AI
$1,278/mo
Input $2.00/M · Output $6.00/M
At this workload, Mistral Large latest is 22% cheaper than Gemini 3.1 Pro preview — a savings of $365/month ($4,383/year).
Production recipe — Agent Command Center
strategy: cost-optimized
primary:
  model: mistral-large-latest
  provider: vertex-ai
fallback:
  model: gemini-3-1-pro-preview
  provider: vertex-ai
shadow: { sample_rate: 0.05 }   # mirror 5% of traffic to compare quality live
Gemini 3.1 Pro preview Mistral Large latest
Input price $2.00/M $2.00/M
Output price $12.00/M $6.00/M
Context window 1,048,576 128,000
Max output 65,536 8,191
Function calling
Vision
Audio input
Reasoning
Prompt caching
Structured output
Pricing verified May 12, 2026 May 12, 2026
Cheaper option
~50% cheaper than Gemini 3.1 Pro preview
Larger context
1,048,576 tokens
More capabilities
6 of 6 capability flags advertised

Benchmark comparison

Side-by-side public benchmark scores. Greener bar = winner.

Chatbot Arena ELOgeneral
Gemini 3.1 Pro preview
1,492
Mistral Large latest
GPQA Diamondreasoning
Gemini 3.1 Pro preview
94.3%
Mistral Large latest
SWE-bench Verifiedagent
Gemini 3.1 Pro preview
80.6%
Mistral Large latest
MMMU-Promultimodal
Gemini 3.1 Pro preview
80.5%
Mistral Large latest
ARC-AGI-2reasoning
Gemini 3.1 Pro preview
77.1%
Mistral Large latest
SciCodecode
Gemini 3.1 Pro preview
59.0%
Mistral Large latest
Humanity's Last Examreasoning
Gemini 3.1 Pro preview
44.4%
Mistral Large latest