Cheaper overall
Gemini 4 Argon
80% lower blended rate
Higher benchmark scores
Claude Fable 5.1
leads on 13 of 16 figures
Bigger context window
Gemini 4 Argon
1,048,576 vs 1,000,000 tokens
Cheaper cached input
Gemini 4 Argon
$0.10 vs $0.25, 60% less
Where each one wins
Gemini 4 Argon
- Cheaper input tokens $2.00 vs $10.00, 80% less
- Cheaper output tokens $10.00 vs $50.00, 80% less
- Cheaper cached input $0.10 vs $0.25, 60% less
- Cheaper on all four workloads
- Larger context window 1,048,576 tokens
- Higher answer reliability (Omniscience Non-Hallucination) 84.9 vs 34.4
- Higher Svg Elo 1,329 vs 1,296
- Higher Website Elo 1,316 vs 1,312
Claude Fable 5.1
- Longer maximum output 128,000 tokens
- Higher overall intelligence (Intelligence Index) 53.4 vs 52.6
- Higher expert-exam performance (Humanity's Last Exam) 59.1 vs 57.1
- Higher long-context reasoning (AA-LCR) 85.3 vs 79.7
- Ahead on 10 more benchmark figures
- Offers Batch pricing not listed for Gemini 4 Argon
What four workloads cost
One run, and the same run a thousand times.
Gemini 4 Argon is cheaper on all four workloads, by much the same margin each time — about 4.9 times, from $0.0070 against $0.0350 on a chat turn to $0.8300 against $4.15 on a long document.
| Workload | Gemini 4 Argon | Claude Fable 5.1 | ×1,000 | Difference |
|---|---|---|---|---|
| Chat turn 1,000 in / 500 out | $0.0070 | $0.0350 | $7.00 / $35.00 | Gemini 4 Argon is 80% cheaper |
| RAG answer 10,000 in / 800 out | $0.0280 | $0.1400 | $28.00 / $140.00 | Gemini 4 Argon is 80% cheaper |
| Agent loop 32,000 in / 700 out × 20 calls | $0.2800 | $1.25 | $280.00 / $1,250.00 | Gemini 4 Argon is 78% cheaper |
| Long document 400,000 in / 3,000 out | $0.8300 | $4.15 | $830.00 / $4,150.00 | Gemini 4 Argon is 80% cheaper |
Price per 1M tokens
Neither model changes its rate with prompt length, so these rates apply to every request.
| Context band | Price | Gemini 4 Argon | Claude Fable 5.1 | Difference |
|---|---|---|---|---|
| Any prompt length | Input | $2.00 | $10.00 | Gemini 4 Argon is 80% cheaper |
| Any prompt length | Cached input | $0.10 | $0.25 | Gemini 4 Argon is 60% cheaper |
| Any prompt length | Output | $10.00 | $50.00 | Gemini 4 Argon is 80% cheaper |
Blended: Gemini 4 Argon $4.00, Claude Fable 5.1 $20.00 per 1M — one rate at 3:1 input to output, for comparing two models at a glance.
Gemini 4 Argon priced by Perplexity, Claude Fable 5.1 by Anthropic. Standard tier, pay-as-you-go.
Other pricing tiers
Only Claude Fable 5.1 lists Batch, at up to 50% off its own standard rate; Gemini 4 Argon does not offer it.
Every tier either model sells is here, so this is the whole price sheet. A saving is measured against that model's own standard rate — how we read tiers.
| Tier | Gemini 4 Argon | Claude Fable 5.1 | Cheaper |
|---|---|---|---|
| Batch only on Claude Fable 5.1 | Not offered | $5.00 in / $25.00 out 50% off Standard | — |
Benchmarks
They share 16 figures: Gemini 4 Argon leads on 3, Claude Fable 5.1 on 13. The widest gap is 225 points, on Spreadsheet Elo.
Overall intelligence
Intelligence Index — Overall intelligence across reasoning, knowledge & math evals
Claude Fable 5.1 ahead by 0.8
Expert-exam performance
Humanity's Last Exam — Expert-level questions across many academic domains
Claude Fable 5.1 ahead by 2
Long-context reasoning
AA-LCR — Long-context reasoning across large inputs
Claude Fable 5.1 ahead by 5.6
Scientific coding
SciCode — Research-level scientific coding tasks
Claude Fable 5.1 ahead by 1.3
Physics research reasoning
CritPt — Unpublished physics research reasoning problems
Claude Fable 5.1 ahead by 4
Real-world task performance
GDPval — Economically valuable, real-world knowledge work
Claude Fable 5.1 ahead by 6.5
Factual accuracy
Omniscience Accuracy — Breadth of factual knowledge across domains
Claude Fable 5.1 ahead by 17.3
Answer reliability
Omniscience Non-Hallucination — How reliably the model avoids fabricated answers
Gemini 4 Argon ahead by 50.5
Spreadsheet Elo
Design Arena head-to-head rating in the spreadsheet category
Claude Fable 5.1 ahead by 225
3d Elo
Design Arena head-to-head rating in the 3d category
Claude Fable 5.1 ahead by 6
Codecategories Elo
Design Arena head-to-head rating in the codecategories category
Claude Fable 5.1 ahead by 5
Dataviz Elo
Design Arena head-to-head rating in the dataviz category
Claude Fable 5.1 ahead by 14
Gamedev Elo
Design Arena head-to-head rating in the gamedev category
Claude Fable 5.1 ahead by 12
Svg Elo
Design Arena head-to-head rating in the svg category
Gemini 4 Argon ahead by 33
Uicomponent Elo
Design Arena head-to-head rating in the uicomponent category
Claude Fable 5.1 ahead by 1
Website Elo
Design Arena head-to-head rating in the website category
Gemini 4 Argon ahead by 4
Each figure is that model's best published run, with the effort level named beside it — where these scores come from.
Specifications
Gemini 4 Argon holds 48,576 more input tokens in one request. Gemini 4 Argon also takes audio and video. Both list the same capabilities, so nothing here separates them.
| Specification | Gemini 4 Argon | Claude Fable 5.1 |
|---|---|---|
| Context window | 1,048,576 tokens | 1,000,000 tokens |
| Max output | 65,536 tokens | 128,000 tokens |
| Takes in | Text, audio, image, video, file | Text, image, file |
| Puts out | Text | Text |
| Knowledge cutoff | 31 Mar 2026 | 30 Jun 2026 |
| Released | 13 Oct 2026 | 1 Sep 2026 |
| Status | Active | Active |
| Sold by | Perplexity | Anthropic, Perplexity |
| Tool use | Yes | Yes |
| Structured outputs | Yes | Yes |
| Web search | Not listed | Not listed |
| Prompt caching | Yes | Yes |
| Code execution | Yes | Yes |
| Computer use | Yes | Yes |
| Open weights | Not listed | Not listed |
| Reasoning | Yes | Yes |
FAQs
- Is Gemini 4 Argon cheaper than Claude Fable 5.1?
- Yes. A 1,000-token prompt with a 500-token reply costs $0.0070 on Gemini 4 Argon and $0.0350 on Claude Fable 5.1, and the same model is cheaper on every workload on this page.
- How much do Gemini 4 Argon and Claude Fable 5.1 cost per 1M tokens?
- Gemini 4 Argon costs $2.00 for input and $10.00 for output. Claude Fable 5.1 costs $10.00 and $50.00. Standard pay-as-you-go rates, as of 17 Oct 2026.
- Which is better, Gemini 4 Argon or Claude Fable 5.1?
- On published benchmarks, Claude Fable 5.1. It leads on 13 of the 16 figures both models report, including overall intelligence (Intelligence Index), where it scores 53.4 against 52.6.
- Does Gemini 4 Argon or Claude Fable 5.1 offer batch pricing?
- Claude Fable 5.1 only. Its batch input costs $5.00, 50% off its standard rate, and Gemini 4 Argon lists no batch tier at all.
- Does Gemini 4 Argon or Claude Fable 5.1 have a bigger context window?
- Gemini 4 Argon, at 1,048,576 tokens against 1,000,000. That is 48,576 more input tokens in a single request.