# Together AI — DeepSeek V4 Pro 0813 vs Claude Fable 5 on DeepSWE: Cost, Coding, and Routing

- Company: Together AI (together.ai)
- Announced: 2026-08-17T00:00:00+00:00
- Subject: Inference platform
- Models affected: DeepSeek V4 Pro 0813, Claude Fable 5
- Pricing: At $0.24 a rollout, DeepSeek V4 Pro 0813 is 90x cheaper than Fable ($21.63)
- Source: https://www.together.ai/blog/deepseek-v4-pro-0813-vs-claude-fable-5-on-deepswe-cost-coding-and-routing
- Record: https://forck.live/items/4159-deepseek-v4-pro-0813-vs-claude-fable-5-on-deepswe-cost-coding-and-routing

The blog post compares DeepSeek V4 Pro 0813 and Claude Fable 5 on the DeepSWE benchmark, finding that DeepSeek V4 Pro 0813 is 90x cheaper and achieves comparable or better performance with multiple attempts. A cascade routing strategy (Pro first, escalate to Fable) solves 82.7% of tasks at $8.28 each, outperforming Fable alone.

## Evidence

Verbatim from https://www.together.ai/blog/deepseek-v4-pro-0813-vs-claude-fable-5-on-deepswe-cost-coding-and-routing:

> Run DeepSeek V4 Pro 0813 first, escalate to Claude Fable 5 only when it fails. That cascade solves 82.7% of DeepSWE tasks at $8.28 each.

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