Claude Mythos 5 vs DeepSeek V4 Pro
Claude Mythos 5 (2026) and DeepSeek V4 Pro (2026) are frontier-tier reasoning models from Anthropic and DeepSeek. Claude Mythos 5 ships a 1m-token context window, while DeepSeek V4 Pro ships a 1m-token context window. On Humanity's Last Exam, Claude Mythos 5 leads by 26.8 pts. 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 Mythos 5 only for coding workflow support.
Decision scorecard
Local evidence first| Signal | Claude Mythos 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 | 3 tracked | 5 tracked |
| Shared benchmarks | Humanity's Last Exam leader | 1 shared |
Decision tradeoffs
- Claude Mythos 5 holds a shared-benchmark lead on Humanity's Last Exam, ahead by 26.8 points.
- Claude Mythos 5 uniquely exposes Vision, Multimodal, and Code execution in local model data.
- Local decision data tags Claude Mythos 5 for Coding, RAG, and Agents.
- DeepSeek V4 Pro has the lower cheapest tracked output price at $0.87/1M tokens.
- DeepSeek V4 Pro has broader tracked provider coverage for fallback and procurement flexibility.
- 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 Mythos 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
- No overlapping tracked provider route is sourced for Claude Mythos 5 and DeepSeek V4 Pro; plan for SDK, billing, or endpoint changes.
- 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, Multimodal, and Code execution before moving production traffic.
- No overlapping tracked provider route is sourced for DeepSeek V4 Pro and Claude Mythos 5; plan for SDK, billing, or endpoint changes.
- Claude Mythos 5 is $49.13/1M tokens higher on cheapest tracked output pricing, so quality gains need to justify the spend.
- Claude Mythos 5 adds Vision, Multimodal, and Code execution 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 |
| Commercial use | Commercial use: conditional | Commercial use: permitted |
| Knowledge cutoff | - | - |
Pricing and availability
| Pricing attribute | Claude Mythos 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 Mythos 5 | DeepSeek V4 Pro |
|---|---|---|
| Vision | Yes | No |
| Multimodal | Yes | No |
| Reasoning | Yes | Yes |
| Function calling | Yes | Yes |
| Tool use | Yes | Yes |
| Structured outputs | Yes | Yes |
| Code execution | Yes | No |
| IDE integration | No | No |
| Computer use | No | No |
| Parallel agents | No | No |
Benchmarks
| Benchmark | Claude Mythos 5 | DeepSeek V4 Pro |
|---|---|---|
| Humanity's Last Exam | 64.5 | 37.7 |
Deep dive
On shared benchmark coverage, Humanity's Last Exam has Claude Mythos 5 at 64.5 and DeepSeek V4 Pro at 37.7, with Claude Mythos 5 ahead by 26.8 points. The largest visible gap is 26.8 points on Humanity's Last Exam, which matters most when that benchmark mirrors your workload. Treat isolated benchmark wins as directional, because provider routing, prompt style, and tool access can move real application results.
The capability footprint differs most on vision: Claude Mythos 5, multimodal input: Claude Mythos 5, and code execution: Claude Mythos 5. Both models share reasoning mode, function calling, tool use, and structured outputs, so the practical split is not just feature count. Use those differences to decide whether the page is about raw model quality, agentic coding support, multimodal ingestion, or predictable structured API behavior.
For cost, Claude Mythos 5 lists $10/1M input and $50/1M output tokens on the cheapest tracked provider, while DeepSeek V4 Pro lists $0.43/1M input and $0.87/1M output tokens on the cheapest tracked provider. A 70/30 input-output blend puts DeepSeek V4 Pro lower by about $21.43 per million blended tokens. Availability is 3 providers versus 5, so concentration risk also matters.
Choose Claude Mythos 5 when coding workflow support are central to the workload. Choose DeepSeek V4 Pro when provider fit, lower input-token cost, and broader provider choice are more important. For production, rerun your own prompts through the exact provider, region, and tool stack you plan to ship.
FAQ
Which has a larger context window, Claude Mythos 5 or DeepSeek V4 Pro?
Claude Mythos 5 supports 1m tokens, while DeepSeek V4 Pro supports 1m tokens. That gap matters most for long documents, large codebases, retrieval-heavy agents, and conversations where earlier context must remain visible.
Which is cheaper, Claude Mythos 5 or DeepSeek V4 Pro?
DeepSeek V4 Pro is cheaper on tracked token pricing. Claude Mythos 5 costs $10/1M input and $50/1M output tokens. DeepSeek V4 Pro costs $0.43/1M input and $0.87/1M output tokens. Provider discounts or batch pricing can still change the final bill.
Is Claude Mythos 5 or DeepSeek V4 Pro open source?
Claude Mythos 5 is listed under Proprietary. DeepSeek V4 Pro is listed under MIT. License labels affect whether you can self-host, redistribute weights, or rely only on hosted APIs, so confirm the upstream license before deployment.
Which is better for vision, Claude Mythos 5 or DeepSeek V4 Pro?
Claude Mythos 5 has the clearer documented vision signal in this comparison. If vision is mission-critical, validate it against the provider endpoint because model-level support and API-level exposure can differ.
Which is better for multimodal input, Claude Mythos 5 or DeepSeek V4 Pro?
Claude Mythos 5 has the clearer documented multimodal input signal in this comparison. If multimodal input is mission-critical, validate it against the provider endpoint because model-level support and API-level exposure can differ.
Where can I run Claude Mythos 5 and DeepSeek V4 Pro?
Claude Mythos 5 is available on Anthropic, AWS Bedrock, and GCP Vertex AI. DeepSeek V4 Pro is available on DeepSeek Platform, Fireworks AI, OpenRouter, Vercel AI Gateway, and Novita AI. Provider coverage can affect latency, region availability, compliance posture, and fallback options.
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Last reviewed: 2026-06-24. Data sourced from public model cards and provider documentation.