Is Claude Sonnet 5.5 cheaper than Gemini 4 Argon?
Per token, they cost the same. For an agent task (80,000 input tokens, 60,000 of them cached, and 6,000 output), they cost the same: $106 against $106 per 1,000 tasks.
API price comparison · Updated
Claude Sonnet 5.5 vs Gemini 4 Argon pricing
Claude Sonnet 5.5 costs $2.00 per million input tokens and $10.00 per million output tokens; Gemini 4 Argon costs $2.00 and $10.00. The list prices are identical, so caching, long prompts and token counts decide which costs less. For an agent task (80,000 input tokens, 60,000 of them cached, and 6,000 output), Claude Sonnet 5.5 costs $0.106 and Gemini 4 Argon $0.106: they cost the same. Gemini 4 Argon's price changes on Dec 1, 2026 to $4.00 input and $20.00 output per million tokens.
Compare your monthly cost on Claude Sonnet 5.5 and Gemini 4 Argon
Estimated monthly cost
Claude Sonnet 5.5$1,100$0.011 per request
Gemini 4 Argon$1,100$0.011 per request
Same cost for this workload. Excludes cache writes, tools and taxes.
Claude Sonnet 5.5 vs Gemini 4 Argon prices per million tokens
| Price | Claude Sonnet 5.5 | Gemini 4 Argon |
|---|---|---|
| Model ID | claude-sonnet-5-5 | gemini-4-argon |
| Input | $2.00 | $2.00 |
| Cache read | $0.10 | $0.10 |
| Cache write | $2.50 | Storage billed per hour |
| Output | $10.00 | $10.00 |
| Batch in / out | $1.00 / $5.00 | $1.00 / $5.00 |
| Long prompts | Same rate | Same rate |
| Scheduled change | None announced | From Dec 1, 2026: $4.00 / $20.00 |
| Status | Available | Paid tier only |
Prices for each provider’s own API, from Anthropic’s pricing page and Google Gemini’s pricing page. The lower price in each row is highlighted. Ganivra uses these same rates to price Claude Sonnet 5.5 and Gemini 4 Argon calls.
What one request costs on Claude Sonnet 5.5 and Gemini 4 Argon
Worked out from the prices above at standard rates, with no Batch discount. Long-prompt rates apply where a model has them.
| Request | Claude Sonnet 5.5 | Gemini 4 Argon | Per 1,000 requests | Difference |
|---|---|---|---|---|
| Chat reply3,000 input tokens, 500 output | $0.011 | $0.011 | $11.00 / $11.00 | Same cost |
| Document summary30,000 input tokens, 1,500 output | $0.075 | $0.075 | $75.00 / $75.00 | Same cost |
| Agent task80,000 input tokens (60,000 cached), 6,000 output | $0.106 | $0.106 | $106 / $106 | Same cost |
| Long document300,000 input tokens, 2,000 output | $0.620 | $0.620 | $620 / $620 | Same cost |
What changes which one costs less
- Prompt caching
- Cache reads cost $0.10 per million, 5% of the input price on Claude Sonnet 5.5, and $0.10 per million, 5% of the input price on Gemini 4 Argon. The more of each prompt you reuse, the more this decides the bill.
- Cache writes
- Claude Sonnet 5.5 charges $2.50 per million tokens written to cache. Gemini 4 Argon charges no write fee; Gemini bills cache storage per million tokens per hour.
- Long prompts
- On Claude Sonnet 5.5, one rate at any prompt length. On Gemini 4 Argon, one rate at any prompt length. A 300 prompt costs $0.620 on Claude Sonnet 5.5 and $0.620 on Gemini 4 Argon.
- Batch API
- Claude Sonnet 5.5 costs 50% less through the Batch API: $1.00 input and $5.00 output. Gemini 4 Argon costs 50% less through the Batch API: $1.00 input and $5.00 output.
- Price change on Dec 1, 2026
- Gemini 4 Argon goes from $2.00 input and $10.00 output to $4.00 input and $20.00 output per million tokens. Calls before then keep the old price; the agent task goes from $0.106 to $0.212.
- Gemini 4 Argon availability
- Paid tier only.
- Token counts
- Anthropic and Google Gemini use different tokenizers, so the same text becomes a different number of tokens. The model with the lower per-token price can still cost more per request; compare on your own prompts before switching.
Compare them on your own customers, not a sample request.
Ganivra prices every Claude Sonnet 5.5 and Gemini 4 Argon call you make and adds it up by customer, feature and workflow, next to what each customer pays. Switch a workflow and see what it did to each customer’s margin.
Claude Sonnet 5.5 vs Gemini 4 Argon pricing questions
How much does Claude Sonnet 5.5 cost per million tokens?
$2.00 input and $10.00 output per million tokens on Anthropic's API, with cached input at $0.10 and Batch at $1.00 input and $5.00 output. The rate is the same at any prompt length.
How much does Gemini 4 Argon cost per million tokens?
$2.00 input and $10.00 output per million tokens on Google Gemini's API, with cached input at $0.10 and Batch at $1.00 input and $5.00 output. The rate is the same at any prompt length.
Which is cheaper for long prompts, Claude Sonnet 5.5 or Gemini 4 Argon?
For a 300,000 input tokens, 2,000 output request, Claude Sonnet 5.5 costs $0.620 and Gemini 4 Argon $0.620: they cost the same. On Claude Sonnet 5.5, one rate at any prompt length; on Gemini 4 Argon, one rate at any prompt length.
Is Gemini 4 Argon getting more expensive?
Yes. On Dec 1, 2026, Gemini 4 Argon goes from $2.00 input and $10.00 output to $4.00 input and $20.00 output per million tokens. After the change, the agent task costs $0.212 on Gemini 4 Argon against $0.106 on Claude Sonnet 5.5.
How do I compare Claude Sonnet 5.5 and Gemini 4 Argon on my own traffic?
Record what each call actually used, then price the same usage on both models. Ganivra does this from your recorded calls: it shows what each customer, feature and workflow would cost on Claude Sonnet 5.5 and on Gemini 4 Argon, next to what each customer pays you.
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