Claude Opus 4.7 vs Gemini 3.5 Flash — LLM API Cost Comparison
Compare Claude Opus 4.7 (Anthropic) vs Gemini 3.5 Flash (Google) on cost per million tokens, context window, and monthly spend.
Prices verified 2026-05-20 · Pricing may change — use the calculator for current estimates
- Input
- $5/1M tokens
- Output
- $25/1M tokens
- Context
- 1M tokens
- Released
- 2026-05
Most capable Anthropic model; step-change in agentic coding
- Input
- $1.5/1M tokens
- Output
- $9/1M tokens
- Context
- 1M tokens
- Released
- 2026-05
Latest Gemini; frontier intelligence + superior search & grounding
Monthly Cost by Usage Tier (70% input / 30% output ratio)
| Usage | Claude Opus 4.7 | Gemini 3.5 Flash | Cheaper by |
|---|---|---|---|
| Light (1M tokens) | $11.00 | $3.75 | Gemini 3.5 Flash (66%) |
| Moderate (10M tokens) | $110 | $37.50 | Gemini 3.5 Flash (66%) |
| Heavy (100M tokens) | $1,100 | $375 | Gemini 3.5 Flash (66%) |
| Very Heavy (1B tokens) | $11,000 | $3,750 | Gemini 3.5 Flash (66%) |
Frequently Asked Questions
Which is cheaper — Claude Opus 4.7 or Gemini 3.5 Flash?
For input tokens, Gemini 3.5 Flash is cheaper at $1.5/1M tokens — 3.3× less than $5/1M. For output tokens, Gemini 3.5 Flash wins at $9/1M vs $25/1M. At heavy workloads (100M tokens/month), the cost difference can be significant.
What is the context window difference between Claude Opus 4.7 and Gemini 3.5 Flash?
Claude Opus 4.7 supports 1,000,000 tokens per request; Gemini 3.5 Flash supports 1,000,000 tokens. Claude Opus 4.7 wins on context length, making it better for long documents, large codebases, or extended conversations without chunking.
When should I choose Claude Opus 4.7 over Gemini 3.5 Flash?
Choose Claude Opus 4.7 (Anthropic) if you prefer Anthropic's ecosystem, tooling, or reliability track record. Most capable Anthropic model; step-change in agentic coding. Choose Gemini 3.5 Flash (Google) if Latest Gemini; frontier intelligence + superior search & grounding. the price/performance fits your workload better. Use this calculator to find the break-even point for your exact token volume.
How much does 1 billion tokens cost on Claude Opus 4.7 vs Gemini 3.5 Flash?
At 700M input + 300M output tokens (1B total): Claude Opus 4.7 costs $11000; Gemini 3.5 Flash costs $3750. The difference is $7250/billion tokens at this 70/30 input/output ratio.