Claude Opus 5.5 vs Gemini 4 Argon — LLM API Cost Comparison
Compare Claude Opus 5.5 (Anthropic) vs Gemini 4 Argon (Google) on cost per million tokens, context window, and monthly spend.
Pricing data updated 2026-11-02 · Pricing may change — use the calculator for current estimates
- Input
- $4/1M tokens
- Output
- $20/1M tokens
- Context
- 1M tokens
- Released
- 2026-09
Auto-added 2026-11; set isCurrent: true after review
- Input
- $2/1M tokens
- Output
- $10/1M tokens
- Context
- 1M tokens
- Released
- 2026-10
Auto-added 2026-11; set isCurrent: true after review
Monthly Cost by Usage Tier (70% input / 30% output ratio)
| Usage | Claude Opus 5.5 | Gemini 4 Argon | Cheaper by |
|---|---|---|---|
| Light (1M tokens) | $8.80 | $4.40 | Gemini 4 Argon (50%) |
| Moderate (10M tokens) | $88.00 | $44.00 | Gemini 4 Argon (50%) |
| Heavy (100M tokens) | $880 | $440 | Gemini 4 Argon (50%) |
| Very Heavy (1B tokens) | $8,800 | $4,400 | Gemini 4 Argon (50%) |
Frequently Asked Questions
Which is cheaper — Claude Opus 5.5 or Gemini 4 Argon?
For input tokens, Gemini 4 Argon is cheaper at $2/1M tokens (2.0x lower). For output tokens, Gemini 4 Argon is cheaper at $10/1M tokens. Total cost depends on the input and output mix.
What is the context window difference between Claude Opus 5.5 and Gemini 4 Argon?
Claude Opus 5.5 supports 1,000,000 tokens per request; Gemini 4 Argon supports 1,048,576 tokens. Gemini 4 Argon has the longer listed context window.
When should I choose Claude Opus 5.5 over Gemini 4 Argon?
Choose Claude Opus 5.5 (Anthropic) if you prefer Anthropic's ecosystem, tooling, or reliability track record. Auto-added 2026-11; set isCurrent: true after review. Choose Gemini 4 Argon (Google) if Auto-added 2026-11; set isCurrent: true after review. 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 5.5 vs Gemini 4 Argon?
At 700M input + 300M output tokens (1B total): Claude Opus 5.5 costs $8800; Gemini 4 Argon costs $4400. The difference is $4400/billion tokens at this 70/30 input/output ratio.