Model comparison - Similar price, same tier
Claude Sonnet 5.5 vs Gemini 4 Argon
Claude Sonnet 5.5 is from Anthropic and Gemini 4 Argon is from Google. Both list the same first-party API price: $2 per 1M input tokens and $10 per 1M output tokens. Claude Sonnet 5.5 has a 1,000,000-token context window and Gemini 4 Argon 1,048,576 tokens; max output is 128,000 and 65,536 tokens per response. Claude Sonnet 5.5 was released on September 28, 2026 and Gemini 4 Argon on October 13, 2026. Both are closed-weights models, available only through an API.
Last verified from each provider's pricing page. All sources
Side-by-side specs
| Spec | Claude Sonnet 5.5 | Gemini 4 Argon |
|---|---|---|
| Provider | Anthropic | |
| Input / 1M tokens | $2 | $2 |
| Output / 1M tokens | $10 | $10 |
| Cache read / 1M | $0.10 | $0.10 |
| Cache write / 1M | $2.50 | - |
| Batch input / 1M | $1 | $1 |
| Batch output / 1M | $5 | $5 |
| Context window | 1,000,000 | 1,048,576 |
| Max output | 128,000 | 65,536 |
| Release date | ||
| Weights | Closed | Closed |
| API model id | claude-sonnet-5-5 | gemini-4-argon |
| AI Gateway id | anthropic/claude-sonnet-5.5 | google/gemini-4-argon |
| Last verified |
Prices in USD per 1M tokens at each provider's standard first-party rate. A dash means the provider does not bill that item separately or no primary page states it.
What each costs in practice
The same three workloads every model page uses, worked from each model's standard list rates. Swap in your own token counts with the math on each model's page.
| Workload | Claude Sonnet 5.5 | Gemini 4 Argon |
|---|---|---|
| One agent session1M input tokens and 100K output tokens, no caching. | $3.00 | $3.00 |
| A chat app10,000 requests a day at 2K input and 500 output tokens each. | $90.00$2,700.00 per 30-day month | $90.00$2,700.00 per 30-day month |
| The same session at a 90% cache hit90% of the input is read from the prompt cache. The one-time cache write premium is not included. | $1.29 | $1.29 |
Show the math
Claude Sonnet 5.5
- One agent sessionInput: 1M x $2 = $2.00Output: 0.1M x $10 = $1.00
- A chat appInput: 20M x $2 = $40.00Output: 5M x $10 = $50.00
- The same session at a 90% cache hitCached input: 0.9M x $0.10 = $0.09Uncached input: 0.1M x $2 = $0.20Output: 0.1M x $10 = $1.00
Gemini 4 Argon
- One agent sessionInput: 1M x $2 = $2.00Output: 0.1M x $10 = $1.00
- A chat appInput: 20M x $2 = $40.00Output: 5M x $10 = $50.00
- The same session at a 90% cache hitCached input: 0.9M x $0.10 = $0.09Uncached input: 0.1M x $2 = $0.20Output: 0.1M x $10 = $1.00
Benchmarks under the same setting
No board in the benchmark directory lists both Claude Sonnet 5.5 and Gemini 4 Argon under the same setting, so there is no like-for-like score to show here.
Set them up in your tools
Step-by-step guides whose official docs list Claude Sonnet 5.5 or Gemini 4 Argon by model id.
Model pages
FAQ
How do Claude Sonnet 5.5 and Gemini 4 Argon compare on price?
Both list the same first-party API price: $2 per 1M input tokens and $10 per 1M output tokens. For one agent session of 1M input and 100K output tokens with no caching, that is $3.00 on Claude Sonnet 5.5 and $3.00 on Gemini 4 Argon. Prices are each provider's first-party list rates, verified October 17, 2026 and October 17, 2026.
What are the context windows of Claude Sonnet 5.5 and Gemini 4 Argon?
Claude Sonnet 5.5 has a 1,000,000-token context window and Gemini 4 Argon 1,048,576 tokens; max output is 128,000 and 65,536 tokens per response.
Are Claude Sonnet 5.5 and Gemini 4 Argon open weights?
Claude Sonnet 5.5 is closed-weights and is called through Anthropic's API as claude-sonnet-5-5. Gemini 4 Argon is closed-weights and is called through Google's API as gemini-4-argon.
More comparisons
- Gemini 4 Argon vs GPT-6.1 SolSimilar price, same tier
- Claude Sonnet 5.5 vs GPT-6.1 SolSimilar price, same tier
- Claude Sonnet 5.5 vs Grok 4.7Similar price, same tier
- Claude Opus 5.5 vs Gemini 4 ArgonSimilar price, same tier
- Claude Sonnet 5.5 vs GLM-5.3Open weights vs closed
- Gemini 4 Argon vs Grok 4.7Similar price, same tier
- Claude Sonnet 5.5 vs Qwen3.8-2.4T-A95BSimilar price, same tier
- Gemini 4 Argon vs GLM-5.3Open weights vs closed
Sources
Claude Sonnet 5.5 verified from platform.claude.com; Gemini 4 Argon verified from ai.google.dev. This page is as current as the older of the two: .
- https://platform.claude.com/docs/en/about-claude/pricing
- https://ai.google.dev/gemini-api/docs/pricing
- https://platform.claude.com/docs/en/models/sonnet-5-5/overview
- https://platform.claude.com/docs/en/about-claude/models/overview
- https://platform.claude.com/docs/en/release-notes/overview
- https://ai.google.dev/gemini-api/docs/models/gemini-4-argon
- https://ai.google.dev/gemini-api/docs/latest-model
- https://ai.google.dev/gemini-api/docs/changelog
- https://ai.google.dev/gemini-api/docs/models
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