Claude Fable 5.1 Paid vs 
Sonar Pro Search Paid
Claude Fable 5.1 vs Sonar Pro Search compared — price per token, context window, multimodality, openness and which to choose. Full 2026 breakdown.
Claude Fable 5.1 — full profile › · Sonar Pro Search — full profile ›
Prices & specs refreshed from live data · olud.ai
Open-model prices = cheapest provider via OpenRouter; official maker rates may be higher.
$50 /M outputManaged API (no infra to run)
$15 /M outputManaged API (no infra to run)
Claude Fable 5.1 vs Sonar Pro Search specs
| Spec | Claude Fable 5.1 | Sonar Pro Search | Winner |
|---|---|---|---|
| Maker | Anthropic | Perplexity | – |
| Type | Proprietary | Proprietary | – |
| Context window | 1M tokens | 200K tokens | |
| Input price | $10/M | $3/M | |
| Output price | $50/M | $15/M | |
| Vision / multimodal | Yes | Yes | = Tie |
| Tool / function calling | Yes | No | |
| Self-hostable | No (API only) | No (API only) | – |
| License | Proprietary | Proprietary | – |
Price gap & when to choose each
Sonar Pro Search is ~3.3× cheaper than Claude Fable 5.1 on output tokens ($15 vs $50 per M tokens).
- You want frontier performance through a managed API
- You need the longer 1M context window
- You value reliability & ecosystem
- You don't want to manage infrastructure
- You want frontier performance through a managed API
- You want the lower output price
- You value reliability & ecosystem
- You don't want to manage infrastructure
Feature comparison
| Capability | Claude Fable 5.1 | Sonar Pro Search |
|---|---|---|
| Open weights (downloadable) | ✗ | ✗ |
| Self-hostable | ✗ | ✗ |
| Runs fully offline | ✗ | ✗ |
| Vision / multimodal | ✓ | ✓ |
| Tool / function calling | ✓ | ✗ |
| 1M+ context window | ✓ | ✗ |
Benchmarks: Claude Fable 5.1 vs Sonar Pro Search
Independent benchmark scores measured by Artificial Analysis. Higher is better (except latency).
Benchmark data by Artificial Analysis.
How Claude Fable 5.1 and Sonar Pro Search score
| Criterion | Claude Fable 5.1 | Sonar Pro Search |
|---|---|---|
| Cost-efficiency | 2.0 | 3.0 |
| Context window | 5.0 | 4.0 |
| Openness | 1.5 | 1.5 |
| Self-hosting | 1.0 | 1.0 |
| Multimodality | 5.0 | 3.5 |
Scores come from live data — output price (cost), context length, open vs closed weights (openness & self-hosting) and vision/tool support (multimodality). Raw task quality isn't scored here; it depends on your benchmark — see the verdict.
What each model is
Claude Fable 5.1 Paid
Claude Fable 5.1 improves on Claude Fable 5 across the board, with the biggest gains in agentic coding, long-running agentic workflows, and knowledge work: long code refactors, front-end and visual...
Sonar Pro Search Paid
Exclusively available on the OpenRouter API, Sonar Pro's new Pro Search mode is Perplexity's most advanced agentic search system. It is designed for deeper reasoning and analysis. Pricing is based...
Frequently asked questions
Claude Fable 5.1 vs Sonar Pro Search — which is cheaper?
Sonar Pro Search is cheaper on output ($15/M vs $50/M).
Which has the larger context window?
Claude Fable 5.1 offers the larger context window (1M tokens).
Claude Fable 5.1 vs Sonar Pro Search — which should I pick in 2026?
Choose Sonar Pro Search for the lower output price ($15/M vs $50/M). Choose Claude Fable 5.1 if you need the larger 1M context window.
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