Claude Fable Latest vs Grok 4.20
How do these models stack up? Below is an expert side-by-side comparison of specifications, context window capacity, live pricing per million tokens, and standardized benchmark scores for Claude Fable Latest and Grok 4.20.
Claude Fable Latest
This model always redirects to the latest model in the Claude Fable family.
Grok 4.20
Grok 4.20 is a reasoning model from xAI with industry-leading speed and agentic tool calling capabilities. It combines the lowest hallucination rate on the market with strict prompt adherance, delivering...
Technical Specifications
| Specification | Claude Fable Latest | Grok 4.20 |
|---|---|---|
| Provider | Anthropic | xAI |
| Context Window | 1,000,000 tokens | 2,000,000 tokens |
| Agent Suitability | N/A | N/A |
| Time to First Token (TTFT) | N/A | N/A |
| Deployment Model | managed api | managed api |
| Production Stability | beta | beta |
| API Available | Yes | Yes |
| Released Date | 2026-06-09 | 2026-03-31 |
API Pricing Comparison
Input Price per Million Tokens
Claude Fable Latest
$10.00
Grok 4.20
$1.25
Output Price per Million Tokens
Claude Fable Latest
$50.00
Grok 4.20
$2.50
Want to test both models live?
Run side-by-side prompt prompts in our dynamic Sandbox. Check execution speeds, latency metrics, and compute actual costs in real-time.
Benchmark Performance Metrics
Scores show the raw performance percentages verified across key evaluation suites. Higher bars indicate superior accuracy and capability in that domain.
Claude Fable Latest Quirks & Gotchas
No developer gotchas reported.
Grok 4.20 Quirks & Gotchas
No developer gotchas reported.