Claude Opus 5.5 vs Gemini 4 Argon: API pricing and agent cost
| Model | Provider | Input $/1M | Output $/1M | Cached $/1M | Per task | Per month |
|---|---|---|---|---|---|---|
| Claude Opus 5.5 | Anthropic | $4 | $20 | $0.2 | $0.1400 | $420.00 |
| Gemini 4 Argon | $2.0 | $10.0 | $0.1 | $0.0700 | $210.00 |
For an agent making 5 tool calls per task (3,000 input and 800 output tokens per call) and running 100 tasks a day, Gemini 4 Argon is the cheaper option at $210.00 a month, versus $420.00 for Claude Opus 5.5 (2.0× the cost).
This compares list prices only, not quality. Promo price through Nov 30, 2026; $4.00/$20.00 from Dec 1, 2026 (cached input $0.10 to $0.20).
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