Claude Opus 5 vs Gemini 3.1 Pro Preview: API Pricing Comparison
Anthropic Claude Opus 5 vs Google Gemini 3.1 Pro Preview: token prices, batch and cache rates, Arena ELO, and cost per request for 8 business use cases. Prices in USD per 1 million tokens. Data snapshot: 2026-09-28.
Claude Opus 5 pricing (Anthropic)
- Input: $5.00 per 1M tokens
- Output: $25.00 per 1M tokens
- Batch API (input/output): $2.50 / $12.50
- Prompt-cache read: $0.50
- Context window: 1M
- Arena ELO: 1491 (as of 2026-09-25)
- Full Claude Opus 5 pricing page
Gemini 3.1 Pro Preview pricing (Google)
- Input: $2.00 per 1M tokens
- Output: $12.00 per 1M tokens
- Batch API (input/output): $1.00 / $6.00
- Prompt-cache read: $0.20
- Context window: 1M
- Arena ELO: 1487 (as of 2026-09-25)
- Full Gemini 3.1 Pro Preview pricing page
Cost per 1,000 requests by business use case
List price vs after discounts (prompt caching on the cached input share, batch API for async workloads, only where the provider publishes those rates).
| Use case | Tokens (in/out) | Claude Opus 5 list price | Claude Opus 5 after discounts | Gemini 3.1 Pro Preview list price | Gemini 3.1 Pro Preview after discounts |
|---|---|---|---|---|---|
| Support Ticket | 1,500 / 500 | $20.00 | $16.18 | $9.00 | $7.38 |
| Knowledge Q&A | 2,000 / 800 | $30.00 | $24.05 | $13.60 | $11.08 |
| Meeting Summary | 10,000 / 1,200 | $80.00 | $38.75 | $34.40 | $16.40 |
| Marketing Content | 2,500 / 1,800 | $57.50 | $55.37 | $26.60 | $25.70 |
| Coding Task | 3,000 / 2,000 | $65.00 | $58.63 | $30.00 | $27.30 |
| Invoice Processing | 1,500 / 600 | $22.50 | $10.69 | $10.20 | $4.74 |
| Call Summary | 2,000 / 700 | $27.50 | $13.50 | $12.40 | $6.04 |
| Agent Workflow | 6,000 / 3,000 | $105.00 | $87.15 | $48.00 | $40.44 |
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These are list prices: real cost also depends on caching, batching, negotiated discounts, marketplace agreements, and existing contracts. Get a FinOps review from OptimNow or compare all models.