Claude Fable 5 vs DeepSeek V4 Pro
Claude Fable 5 (2026) and DeepSeek V4 Pro (2026) are frontier-tier reasoning models from Anthropic and DeepSeek. Claude Fable 5 ships a 1m-token context window, while DeepSeek V4 Pro ships a 1m-token context window. On SWE-bench Verified, Claude Fable 5 leads by 15.4 pts. On pricing, DeepSeek V4 Pro costs $0.43/1M input tokens versus $10/1M for the alternative. This comparison covers specs, pricing, API access, capabilities, benchmarks, input and output token costs, and production fit for coding and agent workloads.
DeepSeek V4 Pro is ~2199% cheaper at $0.43/1M; pay for Claude Fable 5 only for vision-heavy evaluation.
Decision scorecard
Local evidence first| Signal | Claude Fable 5 | DeepSeek V4 Pro |
|---|---|---|
| Best for | reasoning-heavy apps, multimodal apps, and tool-calling agents | reasoning-heavy apps, tool-calling agents, and long-context analysis |
| Decision fit | Coding, RAG, and Agents | Coding, RAG, and Agents |
| Context window | 1m | 1m |
| Cheapest output | $50/1M tokens | $0.87/1M tokens |
| Provider routes | 8 tracked | 5 tracked |
| Shared benchmarks | SWE-bench Verified leader | 2 shared |
Decision tradeoffs
- Claude Fable 5 holds a shared-benchmark lead on SWE-bench Verified, ahead by 15.4 points.
- Claude Fable 5 has broader tracked provider coverage for fallback and route flexibility.
- Claude Fable 5 uniquely exposes Vision and Multimodal in local model data.
- Local decision data tags Claude Fable 5 for Coding, RAG, and Agents.
- DeepSeek V4 Pro has the lower cheapest tracked output price at $0.87/1M tokens.
- Local decision data tags DeepSeek V4 Pro for Coding, RAG, and Agents.
Monthly cost at traffic
Estimate token spend from the cheapest tracked input and output route or tier on this page.
Claude Fable 5
$20,500
Cheapest tracked route/tier: Anthropic
DeepSeek V4 Pro
$566
Cheapest tracked route/tier: DeepSeek Platform
Estimated monthly gap: $19,935. Batch, cache, alternate speed tiers, and negotiated pricing are excluded from this local estimate.
Switch friction
- Provider overlap exists on OpenRouter and Vercel AI Gateway; start route-level A/B tests there.
- DeepSeek V4 Pro is $49.13/1M tokens lower on cheapest tracked output pricing before cache, batch, or negotiated discounts.
- Check replacement coverage for Vision and Multimodal before moving production traffic.
- Provider overlap exists on OpenRouter and Vercel AI Gateway; start route-level A/B tests there.
- Claude Fable 5 is $49.13/1M tokens higher on cheapest tracked output pricing, so quality gains need to justify the spend.
- Claude Fable 5 adds Vision and Multimodal in local capability data.
Specs
| Specification | ||
|---|---|---|
| Released | 2026-06-09 | 2026-04-24 |
| Context window | 1m | 1m |
| Parameters | — | 1.6T |
| Architecture | Decoder Only | Mixture of Experts |
| License | Proprietary | MITOSI-approved |
| Openness | Proprietary | Open source |
| Weights | Not released | Available |
| Code | Unknown | Unknown |
| Commercial use | Commercial use: conditional | Commercial use: permitted |
| Knowledge cutoff | - | - |
Pricing and availability
| Pricing attribute | Claude Fable 5 | DeepSeek V4 Pro |
|---|---|---|
| Input price | $10/1M tokens | $0.43/1M tokens |
| Output price | $50/1M tokens | $0.87/1M tokens |
| Providers |
Capabilities
| Capability | Claude Fable 5 | DeepSeek V4 Pro |
|---|---|---|
| Vision | Yes | No |
| Multimodal | Yes | No |
| Reasoning | Yes | Yes |
| JSON / Tool use | Yes | Yes |
| Structured outputs | Yes | Yes |
| Code execution | No | No |
| IDE integration | No | No |
| Computer use | No | No |
| Parallel agents | No | No |
Benchmarks
| Benchmark | Claude Fable 5 | DeepSeek V4 Pro |
|---|---|---|
| SWE-bench Verified | 96.0 | 80.6 |
| SWE-bench Pro | 80.3 | 55.4 |
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Last reviewed: 2026-07-26. Data sourced from public model cards and provider documentation.