Claude Opus 4.8 vs DeepSeek V4
2026 - Pricing, benchmarks, and use case comparison
Quick take
- •DeepSeek V4 is open-weights - free to self-host with no API costs. Claude Opus 4.8 requires paid API access.
- •Claude Opus 4.8 has a 200K context window - 2x larger than DeepSeek V4's 128K. Better for long documents and large codebases.
- •DeepSeek V4 is open-source: fine-tune it, self-host it, or use any inference provider. Claude Opus 4.8 is closed-source.
Specs comparison
| Claude Opus 4.8 | DeepSeek V4 | |
|---|---|---|
| Provider | Anthropic | DeepSeek |
| Type | Closed source | Open source |
| Context window | ✓200K | 128K |
| Input / 1M tokens | $15.00 | ✓Free (self-host) |
| Output / 1M tokens | $75.00 | Free (self-host) |
| Release date | 2026-05 | 2025-12 |
Strengths
Claude Opus 4.8
- ✓Best-in-class multi-step reasoning
- ✓Improved instruction following over Opus 4.7
- ✓Reduced refusals on edge-case and nuanced requests
- ✓Superior long-context comprehension at 200K tokens
- ✓Strong scientific and mathematical analysis
DeepSeek V4
- ✓Mixture-of-Experts architecture - high capability, low activation cost
- ✓Open-source weights freely available
- ✓Strong coding and reasoning benchmarks
- ✓Flash variant offers low-latency inference
- ✓Significantly cheaper to run than US frontier models
Which should you choose?
Choose Claude Opus 4.8 if you need...
- →Complex research and analysis tasks
- →High-stakes code generation
- →Long-document analysis
- →Nuanced reasoning requiring careful judgment
Choose DeepSeek V4 if you need...
- →Self-hosted deployments needing frontier performance
- →Cost-sensitive high-volume inference
- →Coding and technical tasks
- →Researchers studying MoE architectures