AI model comparison
Gemini 4 Argon vs Claude Fable 5.1
Pricing, context window, benchmarks, and features compared side by side. Or skip the guesswork and send one prompt to both.
Gemini 4 Argon
Gemini 4 Argon is Google's flagship reasoning model, built for complex software engineering, deep mathematical and scientific problem solving, and autonomous multi-step agents.
- Input / 1M
- $2
- Output / 1M
- $10
- Context
- 1.05M
Anthropic
Claude Fable 5.1
Claude Fable 5.1 improves on Claude Fable 5 across the board, with the biggest gains in agentic coding, long-running agentic workflows, and knowledge work: long code refactors, front-end and visual
- Input / 1M
- $10
- Output / 1M
- $50
- Context
- 1M
At a glance
Quick verdict
How the two models stack up on the things people ask about most.
Lower price
Gemini 4 Argon
5.0x cheaper for a typical chat
Higher intelligence score
Claude Fable 5.1
53.4 vs 52.6 on Artificial Analysis
Larger context window
Gemini 4 Argon
1.05M vs 1M tokens
Newer release
Gemini 4 Argon
Released October 13, 2026
Benchmarks
Benchmark scores
Independent scores from Artificial Analysis. Higher is better.
Intelligence index
Gemini 4 Argon52.6Claude Fable 5.153.4Coding index
Gemini 4 ArgonNot availableClaude Fable 5.181.6Agentic index
Gemini 4 ArgonNot availableClaude Fable 5.157.9Pricing
Gemini 4 Argon vs Claude Fable 5.1 API pricing
Per-token API rates. Cheaper option highlighted.
| Metric | Gemini 4 Argon | Claude Fable 5.1 |
|---|---|---|
| Input tokensPer 1M tokens | $2 | $10 |
| Output tokensPer 1M tokens | $10 | $50 |
| Cached input (read)Per 1M tokens | $0.10 | $0.25 |
| Cache writePer 1M tokens | $0.19 | $12.50 |
| Web searchPer request | $0.014 | $0.01 |
What it costs in practice
Estimated cost per 1,000 requests at standard rates. Coding and long-document figures also show the cost when the input is already cached.
Chat message
2K in, 500 out
Gemini 4 Argon$9Claude Fable 5.1$45Coding task
30K in, 4K out
Gemini 4 Argon$100$43 cachedClaude Fable 5.1$500$207.50 cachedLong document summary
150K in, 2K out
Gemini 4 Argon$320$35 cachedClaude Fable 5.1$1600$137.50 cachedSpecs
Context window and capabilities
How much each model can read, how much it can write, and what it accepts as input.
| Metric | Gemini 4 Argon | Claude Fable 5.1 |
|---|---|---|
| Context window | 1.05M tokens | 1M tokens |
| Max output | 66K tokens | 128K tokens |
| Input types | Audio, File, Image, Text, Video | File, Image, Text |
| Output types | Text | Text |
| Reasoning effort levels | High, Medium, Low | Max, Extra high, High, Medium, Low |
| Default reasoning effort | Medium | High |
| Release date | October 13, 2026 | September 1, 2026 |
Features
Supported features
API features available for each model.
| Metric | Gemini 4 Argon | Claude Fable 5.1 |
|---|---|---|
| Tool calling | Supported | Supported |
| Structured outputs | Supported | Supported |
| JSON mode | Supported | Supported |
| Reasoning | Supported | Supported |
| Temperature | Supported | Not supported |
| Stop sequences | Supported | Supported |
| Deterministic seed | Supported | Not supported |
| Verbosity control | Not supported | Supported |
Keep exploring
More on these models
Other head-to-heads, the full model page, and the alternatives list for each model.
Gemini 4 ArgonView full model details- Gemini 4 Argon vs Claude Opus 5.5
- Gemini 4 Argon vs Claude Sonnet 5.5
- Gemini 4 Argon vs GPT-6 Astra
- Gemini 4 Argon vs GPT-6.1 Sol
- Gemini 4 Argon vs Claude Opus 5
- Gemini 4 Argon vs Claude Fable 5
- Gemini 4 Argon vs Muse Spark 1.3
- Gemini 4 Argon vs GPT-6 Sol
- Gemini 4 Argon vs GPT-5.6 Sol
- Gemini 4 Argon vs Grok 4.7
- Gemini 4 Argon vs GLM 5.3 Flash
- Gemini 4 Argon vs DeepSeek V4.1 Flash
- Gemini 4 Argon vs GPT-6 Luna
- Gemini 4 Argon vs MiMo-V2.6-Flash
- Gemini 4 Argon vs Step 5 Preview
- Gemini 4 Argon vs Hy4 preview
Claude Fable 5.1View full model details- Claude Fable 5.1 vs Claude Opus 5.5
- Claude Fable 5.1 vs Claude Sonnet 5.5
- Claude Fable 5.1 vs GPT-6 Astra
- Claude Fable 5.1 vs GPT-6.1 Sol
- Claude Fable 5.1 vs Claude Opus 5
- Claude Fable 5.1 vs Claude Fable 5
- Claude Fable 5.1 vs Muse Spark 1.3
- Claude Fable 5.1 vs GPT-6 Sol
- Claude Fable 5.1 vs GPT-5.6 Sol
- Claude Fable 5.1 vs GLM 5.3 Flash
- Claude Fable 5.1 vs Claude Opus 4.8
- Claude Fable 5.1 vs DeepSeek V4.1 Flash
- Claude Fable 5.1 vs GPT-6 Luna
- Claude Fable 5.1 vs MiMo-V2.6-Flash
- Claude Fable 5.1 vs Step 5 Preview
- Claude Fable 5.1 vs Hy4 preview
Our take
Gemini 4 Argon is 5.0x cheaper for a typical chat. Claude Fable 5.1 scores higher on the Artificial Analysis Intelligence Index (53.4 vs 52.6). Gemini 4 Argon has the larger context window (1.05M vs 1M tokens). The right pick depends on your workload, so the quickest way to settle it is to send the same prompt to both and compare.
FAQ
Frequently asked questions
Is Gemini 4 Argon or Claude Fable 5.1 cheaper?
Gemini 4 Argon is cheaper for a typical chat (2K input tokens and 500 output tokens). Gemini 4 Argon costs $2 per 1M input tokens and $10 per 1M output tokens, while Claude Fable 5.1 costs $10 per 1M input tokens and $50 per 1M output tokens.
Which has a bigger context window, Gemini 4 Argon or Claude Fable 5.1?
Gemini 4 Argon supports up to 1.05M tokens of context, compared with 1M for Claude Fable 5.1.
Is Gemini 4 Argon smarter than Claude Fable 5.1?
On the Artificial Analysis Intelligence Index, Gemini 4 Argon scores 52.6 and Claude Fable 5.1 scores 53.4, putting Claude Fable 5.1 ahead. Benchmarks don't capture everything, so the best test is running your own prompts through both.
Can I use Gemini 4 Argon and Claude Fable 5.1 at the same time?
Yes. Shortcut Chat sends one prompt to multiple models at once, so you can see Gemini 4 Argon and Claude Fable 5.1 answer side by side and keep the better response.
Why choose? Ask both.
Send one prompt to Gemini 4 Argon and Claude Fable 5.1 at the same time. Compare the answers side by side and keep the best one.