Claude Fable 5 vs Claude Sonnet 5 — Price, Context, and Capability Compared
Claude Fable 5 vs Claude Sonnet 5: which should I use?
Claude Fable 5 costs 3.3× more per blended million tokens than Claude Sonnet 5. Claude Fable 5 has the larger context window (1,000,000 tokens). Default to Claude Sonnet 5 unless you specifically need Claude Fable 5's edge.
Spec comparison
| Claude Fable 5 | Claude Sonnet 5 | |
|---|---|---|
| Price (input) | $10.00/M | $3.00/M ✓ |
| Price (output) | $50.00/M | $15.00/M ✓ |
| Blended price | $20.00/M | $6.00/M ✓ |
| Context window | 1,000,000 tokens ✓ | 500,000 tokens |
| Max output | 128,000 tokens ✓ | 64,000 tokens |
| Modalities | text, vision | text, vision |
| Reasoning mode | Yes | Yes |
| Released | 2026-05 | 2026-08 |
| Speed | 41 t/s | Not measured |
Cost at scale (3:1 blended)
| Tokens / month | Claude Fable 5 | Claude Sonnet 5 | Delta |
|---|---|---|---|
| 1,000,000 | $20.00 | $6.00 | $14.00 (3.3×) |
| 10,000,000 | $200.00 | $60.00 | $140.00 (3.3×) |
| 100,000,000 | $2000.00 | $600.00 | $1400.00 (3.3×) |
Choose Claude Fable 5 if…
- ✓Most capable widely-released Claude
- ✓1M-token context
- ✓Extended-thinking mode for hard reasoning
- ✓The most demanding reasoning and long-horizon agentic work.
Choose Claude Sonnet 5 if…
- ✓Frontier intelligence at Sonnet economics
- ✓Fast interactive coding performance
- ✓Reliable structured output and extended thinking
- ✓Production workloads that need near-Opus quality with better speed and cost.
Run this exact matchup right now
Send the same prompt to Claude Fable 5 and Claude Sonnet 5 side by side and see the outputs yourself.
Try Claude Fable 5 vs Claude Sonnet 5 FreeFAQ
Is Claude Fable 5 cheaper than Claude Sonnet 5?
Claude Sonnet 5 is cheaper, at $6.00 per million blended tokens vs $20.00 for Claude Fable 5.
Which has the bigger context window, Claude Fable 5 or Claude Sonnet 5?
Claude Fable 5 has the larger context window: 1,000,000 tokens vs 500,000.
Can Claude Fable 5 replace Claude Sonnet 5 for coding?
Both are viable for coding. Most capable widely-released Claude (Claude Fable 5) vs Frontier intelligence at Sonnet economics (Claude Sonnet 5) — pick based on which strength matters more for your workload.
Neither of these? See Claude Fable 5 alternatives or Claude Sonnet 5 alternatives.
Related
Pricing verified 2026-06-24. Specs verified 2026-08-08.