Model comparison - Same provider, successor
Gemini 3.1 Pro Preview vs Gemini 4 Argon
Gemini 3.1 Pro Preview and Gemini 4 Argon are both Google models. On list price, both charge $2 per 1M input tokens, and Gemini 4 Argon charges 17% less than Gemini 3.1 Pro Preview for output ($10 vs $12 per 1M tokens). Gemini 3.1 Pro Preview and Gemini 4 Argon both have a 1,048,576-token context window, and both return up to 65,536 output tokens per response. Gemini 3.1 Pro Preview was released on February 19, 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 | Gemini 3.1 Pro Preview | Gemini 4 Argon |
|---|---|---|
| Provider | ||
| Input / 1M tokens | $2 | $2 |
| Output / 1M tokens | $12 | $10 |
| Cache read / 1M | $0.20 | $0.10 |
| Batch input / 1M | $1 | $1 |
| Batch output / 1M | $6 | $5 |
| Long-context rates above | 200,000 tokens | - |
| Context window | 1,048,576 | 1,048,576 |
| Max output | 65,536 | 65,536 |
| Release date | ||
| Weights | Closed | Closed |
| API model id | gemini-3.1-pro-preview | gemini-4-argon |
| AI Gateway id | google/gemini-3.1-pro-preview | 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 | Gemini 3.1 Pro Preview | Gemini 4 Argon |
|---|---|---|
| One agent session1M input tokens and 100K output tokens, no caching. | $3.20 | $3.00 |
| A chat app10,000 requests a day at 2K input and 500 output tokens each. | $100.00$3,000.00 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. | $1.58 | $1.29 |
Show the math
Gemini 3.1 Pro Preview
- One agent sessionInput: 1M x $2 = $2.00Output: 0.1M x $12 = $1.20
- A chat appInput: 20M x $2 = $40.00Output: 5M x $12 = $60.00
- The same session at a 90% cache hitCached input: 0.9M x $0.20 = $0.18Uncached input: 0.1M x $2 = $0.20Output: 0.1M x $12 = $1.20
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
Only boards that list both models under the same run setting appear here, one row per board and setting, with each score exactly as the board shows it. Scores on different boards use different scales and are never combined.
| Board and setting | Gemini 3.1 Pro Preview | Gemini 4 Argon |
|---|---|---|
| LMArena Text (Text Arena Overall)Text Arena Overall, default leaderboard view (8,834,211 votes, 416 models)Official leaderboard - arena.ai | 1487±3 | 1524±9 (Preliminary) |
Set them up in your tools
Step-by-step guides whose official docs list Gemini 3.1 Pro Preview or Gemini 4 Argon by model id.
- Use Gemini in ClineLists Gemini 4 Argon and Gemini 3.1 Pro Preview
- Use Gemini in ContinueLists Gemini 4 Argon and Gemini 3.1 Pro Preview
- Use Gemini in CursorLists Gemini 4 Argon and Gemini 3.1 Pro Preview
- Use Gemini in GooseLists Gemini 4 Argon and Gemini 3.1 Pro Preview
- Use Gemini in Kilo CodeLists Gemini 4 Argon and Gemini 3.1 Pro Preview
- Use Gemini in OpenCodeLists Gemini 4 Argon and Gemini 3.1 Pro Preview
- Use Gemini in ZedLists Gemini 4 Argon and Gemini 3.1 Pro Preview
Model pages
FAQ
How do Gemini 3.1 Pro Preview and Gemini 4 Argon compare on price?
On list price, both charge $2 per 1M input tokens, and Gemini 4 Argon charges 17% less than Gemini 3.1 Pro Preview for output ($10 vs $12 per 1M tokens). For one agent session of 1M input and 100K output tokens with no caching, that is $3.20 on Gemini 3.1 Pro Preview 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 Gemini 3.1 Pro Preview and Gemini 4 Argon?
Gemini 3.1 Pro Preview and Gemini 4 Argon both have a 1,048,576-token context window, and both return up to 65,536 output tokens per response.
Are Gemini 3.1 Pro Preview and Gemini 4 Argon open weights?
Gemini 3.1 Pro Preview is closed-weights and is called through Google's API as gemini-3.1-pro-preview. 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
- Gemini 2.5 Pro vs Gemini 3.1 Pro PreviewSame provider, successor
- Claude Sonnet 5.5 vs Gemini 4 ArgonSimilar price, same tier
- Claude Opus 5.5 vs Gemini 4 ArgonSimilar price, same tier
- Gemini 4 Argon vs Grok 4.7Similar price, same tier
- Gemini 4 Argon vs GLM-5.3Open weights vs closed
- Gemini 4 Argon vs Qwen3.8-2.4T-A95BSimilar price, same tier
- Gemini 4 Argon vs Qwen3.8-MaxSimilar price, same tier
Sources
Gemini 3.1 Pro Preview verified from ai.google.dev; Gemini 4 Argon verified from ai.google.dev. This page is as current as the older of the two: .
- https://ai.google.dev/gemini-api/docs/pricing
- https://ai.google.dev/gemini-api/docs/models/gemini-3.1-pro-preview
- https://ai.google.dev/gemini-api/docs/changelog
- https://ai.google.dev/gemini-api/docs/models
- https://ai.google.dev/gemini-api/docs/models/gemini-4-argon
- https://ai.google.dev/gemini-api/docs/latest-model
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