| Signal | Claude Fable 5 | Delta | Grok 4.20 |
|---|---|---|---|
Capabilities | 100 | -- | |
Benchmarks | 96 | +10 | |
Pricing | 50 | -47 | |
Context window size | 86 | -4 | |
Recency | 100 | -- | |
Output Capacity | 85 | +65 | |
| Overall Result | 2 wins | of 6 | 2 wins |
Score History
96.6
current score
Claude Fable 5
right now
88.3
current score
Anthropic
xAI
Grok 4.20 saves you $3250.00/month
That's $39000.00/year compared to Claude Fable 5 at your current usage level of 100K calls/month.
| Metric | Claude Fable 5 | Grok 4.20 | Winner |
|---|---|---|---|
| Overall Score | 97 | 88 | Claude Fable 5 |
| Rank | #1 | #17 | Claude Fable 5 |
| Quality Rank | #1 | #17 | Claude Fable 5 |
| Adoption Rank | #1 | #17 | Claude Fable 5 |
| Parameters | -- | -- | -- |
| Context Window | 1000K | 2000K | Grok 4.20 |
| Pricing | $10.00/$50.00/M | $1.25/$2.50/M | -- |
| Signal Scores | |||
| Capabilities | 100 | 100 | Claude Fable 5 |
| Benchmarks | 96 | 86 | Claude Fable 5 |
| Pricing | 50 | 98 | Grok 4.20 |
| Context window size | 86 | 90 | Grok 4.20 |
| Recency | 100 | 100 | Claude Fable 5 |
| Output Capacity | 85 | 20 | Claude Fable 5 |
Our score (0-100) is driven by benchmark performance (90%) from Arena Elo ratings, MMLU, GPQA, HumanEval, SWE-bench, and 15+ standardized evaluations. Capabilities and context window serve as tiebreakers (10%). Learn more about our methodology.
Scores 97/100 (rank #1), placing it in the top 100% of all 290 models tracked.
Scores 88/100 (rank #17), placing it in the top 94% of all 290 models tracked.
Claude Fable 5 has a 8-point advantage, which typically translates to noticeably better performance on complex reasoning, code generation, and multi-step tasks.
Grok 4.20 offers 94% better value per quality point. At 1M tokens/day, you'd spend $56.25/month with Grok 4.20 vs $900.00/month with Claude Fable 5 - a $843.75 monthly difference.
Both models have comparable response speeds. For most applications, the latency difference is negligible.
When latency matters most: Interactive chatbots, IDE code completion, real-time translation, and user-facing applications where response time directly impacts experience. For batch processing, background summarization, or offline analysis, latency is less critical.
Code generation & review
Based on overall model capabilities and architecture for coding tasks like generating functions, debugging, and refactoring
Customer support chatbot
Suitable for user-facing chat with competitive response times. Grok 4.20 also offers lower per-token costs for high-volume support
Long document analysis
Larger context window (2000K tokens) can process longer documents, contracts, and research papers in a single pass
Batch data extraction
Lower output pricing ($2.50/M) reduces costs when processing thousands of records daily
Creative writing & content
Higher overall composite score (97/100) correlates with better nuance, coherence, and style in long-form content
Image understanding & OCR
Supports vision input - can analyze screenshots, diagrams, photos, and scanned documents directly
Claude Fable 5 has a moderate advantage with a 8.299999999999997-point lead in composite score. It wins on more signal dimensions, but Grok 4.20 has specific strengths that could make it the better choice for certain workflows.
Best for Quality
Claude Fable 5
Marginally better benchmark scores; both are excellent
Best for Cost
Grok 4.20
94% lower pricing; better value at scale
Best for Reliability
Claude Fable 5
Higher uptime and faster response speeds
Best for Prototyping
Claude Fable 5
Stronger community support and better developer experience
Best for Production
Claude Fable 5
Wider enterprise adoption and proven at scale
by Anthropic
| Capability | Claude Fable 5 | Grok 4.20 |
|---|---|---|
| Vision (Image Input) | ||
| Function Calling | ||
| Streaming | ||
| JSON Mode | ||
| Reasoning | ||
| Web Search | ||
| Image Output |
Anthropic
xAI
Grok 4.20 saves you $72.75/month
That's 93% cheaper than Claude Fable 5 at 1,000 tokens/request and 100 requests/day.
Assumes 60% input / 40% output token ratio per request. Actual costs may vary based on your usage pattern.
| Parameter | Claude Fable 5 | Grok 4.20 |
|---|---|---|
| Context Window | 1M | 2M |
| Max Output Tokens | 128,000 | -- |
| Open Source | No | No |
| Created | Jun 9, 2026 | Mar 31, 2026 |