Gemini 3.1 Pro Preview

Preview of Gemini 3.1 Pro. Latest evolution of Google's most capable model with improved reasoning.

Input price: $1.80list $2.00-10%
Output price: $10.80list $12.00-10%
Context: 1M
Max output: 64K
Modalities: InputTextImageAudioVideoPDFOutputText
Capability: 155 (#32 of 89)
Human preference: 1480
30-day uptime: —
Released: 2026-02-18
Knowledge cutoff: —

Providers

Providers that serve this model. With Auto, each request goes to the best available provider. Prices in USD per 1M tokens; stats cover the last 30 days.

AutoInput$1.80-10%Output$10.80-10%Cache read$0.18-10%Context1MMax output64KWe send each request to the best-priced healthy provider. You pay that provider’s price.Google (Gemini)Input$1.80-10%Output$10.80-10%Cache read$0.18-10%United StatesNo trainingNo retentionGoogle Vertex AIInput$1.80-10%Output$10.80-10%Cache read$0.18-10%GlobalNo training

Pricing

Prices vary by provider. Showing Google (Gemini), the lowest. Pick a provider above to see its prices.

Prompt ≤ 200K tokens

Input: $1.80list $2.00-10%; per 1M tokens
Output: $10.80list $12.00-10%; per 1M tokens
Cache read: $0.18list $0.20-10%; per 1M tokens
Reasoning output: $10.80list $12.00-10%; per 1M tokens
Audio input: $1.80list $2.00-10%; per 1M tokens
Web search: $0.0126list $0.014-10%; per request

Prompt > 200K tokens

Input: $3.60list $4.00-10%; per 1M tokens
Output: $16.20list $18.00-10%; per 1M tokens
Cache read: $0.36list $0.40-10%; per 1M tokens
Reasoning output: $16.20list $18.00-10%; per 1M tokens
Audio input: $3.60list $4.00-10%; per 1M tokens
Web search: $0.0126list $0.014-10%; per request

Make a request

Set your provider preferences, then copy the request. It reads your API key from OHMYGPT_API_KEY.

curl https://api.ohmygpt.com/v1/models/google/gemini-3.1-pro-preview:generateContent \
  -H "x-goog-api-key: $OHMYGPT_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "contents": [
      {
        "parts": [
          {
            "text": "Hello"
          }
        ]
      }
    ]
  }'

Similar models

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Capability scores are from Epoch AI’s Epoch Capabilities Index (CC BY 4.0, as of 2026-11-02), which combines dozens of benchmarks with GPT-5 set at 150. epoch.ai/eci

Price: our current input price per 1M tokens in USD, lowest across channels. Dated snapshots and resold copies of the same model are merged into one point; free models are not shown.

Shaded area: capability above and price below the median of all models. Pareto frontier: no other model is both cheaper and more capable.

Gemini 3.1 Pro PreviewThis model

Capability: 155
Input: $1.80
Output: $10.80

Gemini 4 Argon

Capability: 166
Input: $1.80
Output: $9.00

GPT-6.1 Sol

Capability: 168
Input: $1.80–$3.60
Output: $9.00–$13.50

Mistral Medium

Capability: —
Input: $1.65
Output: $8.25

Kimi K3.1 Pro

Capability: —
Input: $2.0878–$2.20
Output: $10.9208–$11.00

Human preference ratings are from the LMArena Text Arena (CC BY 4.0, as of 2026-10-28): Elo ratings from blind votes, on a different scale from capability scores. lmarena.ai/leaderboard/text