Claude Fable 5.2 vs Grok 4.7
Grok 4.7 is 5.1x cheaper than Claude Fable 5.2 on our example workload, at list prices.
Side by side
| Measure | Claude Fable 5.2 | Grok 4.7 |
|---|---|---|
| Provider | Anthropic | xAI |
| Input / 1M tokens | $8.00 | $2.00 |
| Output / 1M tokens | $40.00 | $6.00 |
| Output price ÷ input price | 5.0x | 3.0x |
| Blended / 1M (3:1) | $16.00 | $3.00 |
| Context window | 1M | 500K |
| ≈ English words that fit | 750,000 | 375,000 |
| 1,000 calls (2000+500 tok) | $36.00 | $7.00 |
| AA Intelligence Index | 65 | 35 |
| LMArena Text | Not on LMArena yet | 1442 |
| Blended $ per AA index point | $0.246 | $0.086 |
List prices from official pages (Anthropic, xAI), verified 2026-11-10. Benchmarks from public leaderboards (Artificial Analysis, LMArena), not run by us. Word counts use the rough 0.75 words per token rule for English. "$ per index point" is our own arithmetic (blended price ÷ index score), a rough value-for-money signal, not a benchmark.
What real workloads cost
Four example request shapes, priced at list rates with no caching or batch discounts. Monthly figures assume 100,000 requests.
| Workload | Claude Fable 5.2 | Grok 4.7 | Gap |
|---|---|---|---|
| Support chat reply a short system prompt, recent chat history and a reply | $0.0360 each $3,600.00 / mo | $0.00700 each $700.00 / mo | 5.1x |
| RAG answer a question plus about 20K tokens of retrieved documents, and a cited answer | $0.1920 each $19,200.00 / mo | $0.0448 each $4,480.00 / mo | 4.3x |
| 10-step agent task an agent loop of 10 model calls, each re-reading about 8K tokens of context and emitting a 400-token tool call | $0.8000 each $80,000.00 / mo | $0.1840 each $18,400.00 / mo | 4.3x |
| Long-report summary one 200K-token document summarized into about 2K tokens | $1.68 each $168,000.00 / mo | $0.4120 each $41,200.00 / mo | 4.1x |
When to pick each
- Pick Grok 4.7 when cost is the main constraint: at list prices it is 5.1x cheaper than Claude Fable 5.2 on a typical 2,000-in / 500-out call ($7.00 vs $36.00 per 1,000 calls).
- Pick Claude Fable 5.2 when answer quality matters more than price: it scores 65 vs 35 on the Artificial Analysis Intelligence Index, and costs 5.1x more per call.
- Pick Claude Fable 5.2 if a single prompt can exceed 500K tokens (about 375,000 English words): its window is 1M.
- They come from different providers (Anthropic and xAI), so switching means a second API key, SDK and billing account, and tool-calling formats differ. Our schema converter outputs both formats from one JSON Schema.
Context and pricing limits
- Claude Fable 5.2: 1M tokens of context. Grok 4.7: 500K. Claude Fable 5.2 holds 2.0x more.
- Grok 4.7: <200K prompt price; $4/$12 at >=200K. The prices above are this tier; check the official pricing page before committing.
- Cached input, batch and off-peak discounts can cut real bills a lot and differ by provider; they are not included here.
FAQ
Is Grok 4.7 cheaper than Claude Fable 5.2?
Yes, on our 2000-in / 500-out example call it costs $0.00700 vs $0.0360, 5.1x less.
Which has the larger context window?
Claude Fable 5.2, with 1M tokens vs 500K.
Which scores higher on benchmarks?
Claude Fable 5.2 scores 65 vs 35 on the Artificial Analysis Intelligence Index. LMArena Text: Claude Fable 5.2 not on LMArena yet, Grok 4.7 1442. Benchmarks are averages; test both on your own prompts.
Run your own numbers in the token cost estimator · Claude Fable 5.2 pricing · Grok 4.7 pricing · All comparisons