Claude Opus 4.5 vs DeepSeek R1
Claude Opus 4.5 (2025) and DeepSeek R1 (2025) are frontier-tier reasoning models from Anthropic and DeepSeek. Claude Opus 4.5 ships a 200k-token context window, while DeepSeek R1 ships a 128k-token context window. On SWE-bench Verified, Claude Opus 4.5 leads by 31.7 pts. On pricing, DeepSeek R1 costs $0.10/1M input tokens versus $5/1M 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 R1 is ~4900% cheaper at $0.10/1M; pay for Claude Opus 4.5 only for coding workflow support.
Decision scorecard
Local evidence first| Signal | Claude Opus 4.5 | DeepSeek R1 |
|---|---|---|
| Best for | reasoning-heavy apps, multimodal apps, and tool-calling agents | reasoning-heavy apps and provider-routed production |
| Decision fit | Coding, RAG, and Agents | Coding, RAG, and Agents |
| Context window | 200k | 128k |
| Cheapest output | $25/1M tokens | $0.30/1M tokens |
| Provider routes | 6 tracked | 14 tracked |
| Shared benchmarks | SWE-bench Verified leader | 4 rows |
Decision tradeoffs
- Claude Opus 4.5 holds a shared-benchmark lead on SWE-bench Verified, ahead by 31.7 points.
- Claude Opus 4.5 has the larger context window for long prompts, retrieval packs, or transcript analysis.
- Claude Opus 4.5 uniquely exposes Vision, Multimodal, and Function calling in local model data.
- Local decision data tags Claude Opus 4.5 for Coding, RAG, and Agents.
- DeepSeek R1 has the lower cheapest tracked output price at $0.30/1M tokens.
- DeepSeek R1 has broader tracked provider coverage for fallback and procurement flexibility.
- Local decision data tags DeepSeek R1 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 Opus 4.5
$10,250
Cheapest tracked route/tier: Microsoft Foundry
DeepSeek R1
$155
Cheapest tracked route/tier: Bitdeer AI
Estimated monthly gap: $10,095. Batch, cache, alternate speed tiers, and negotiated pricing are excluded from this local estimate.
Switch friction
- Provider overlap exists on OpenRouter, Microsoft Foundry, and AWS Bedrock; start route-level A/B tests there.
- DeepSeek R1 is $24.70/1M tokens lower on cheapest tracked output pricing before cache, batch, or negotiated discounts.
- Check replacement coverage for Vision, Multimodal, and Function calling before moving production traffic.
- Provider overlap exists on Microsoft Foundry, GCP Vertex AI, and AWS Bedrock; start route-level A/B tests there.
- Claude Opus 4.5 is $24.70/1M tokens higher on cheapest tracked output pricing, so quality gains need to justify the spend.
- Claude Opus 4.5 adds Vision, Multimodal, and Function calling in local capability data.
Specs
| Specification | ||
|---|---|---|
| Released | 2025-11-01 | 2025-01-20 |
| Context window | 200k | 128k |
| Parameters | — | 671B, 37B Active |
| Architecture | decoder only | decoder only |
| License | Proprietary | MIT(OSI) |
| Openness | Proprietary | Open source |
| Commercial use | Commercial use with conditions | Commercial use allowed |
| Knowledge cutoff | 2025-12 | 2023-12 |
Pricing and availability
| Pricing attribute | Claude Opus 4.5 | DeepSeek R1 |
|---|---|---|
| Input price | $5/1M tokens | $0.10/1M tokens |
| Output price | $25/1M tokens | $0.30/1M tokens |
| Providers |
Capabilities
| Capability | Claude Opus 4.5 | DeepSeek R1 |
|---|---|---|
| Vision | Yes | No |
| Multimodal | Yes | No |
| Reasoning | Yes | Yes |
| Function calling | Yes | No |
| Tool use | Yes | No |
| Structured outputs | Yes | Yes |
| Code execution | Yes | Yes |
| IDE integration | No | No |
| Computer use | No | No |
| Parallel agents | No | No |
Benchmarks
| Benchmark | Claude Opus 4.5 | DeepSeek R1 |
|---|---|---|
| SWE-bench Verified | 80.9 | 49.2 |
| Google-Proof Q&A | 87.0 | 71.5 |
| Chatbot Arena | 1466.0 | 1372.0 |
| Aider Polyglot | 72.0 | 56.9 |
Deep dive
On shared benchmark coverage, SWE-bench Verified has Claude Opus 4.5 at 80.9 and DeepSeek R1 at 49.2, with Claude Opus 4.5 ahead by 31.7 points; Google-Proof Q&A has Claude Opus 4.5 at 87 and DeepSeek R1 at 71.5, with Claude Opus 4.5 ahead by 15.5 points; Chatbot Arena has Claude Opus 4.5 at 1466 and DeepSeek R1 at 1372, with Claude Opus 4.5 ahead by 94 points. The largest visible gap is 94 points on Chatbot Arena, 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 Opus 4.5, multimodal input: Claude Opus 4.5, function calling: Claude Opus 4.5, and tool use: Claude Opus 4.5. Both models share reasoning mode, structured outputs, and code execution, 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 Opus 4.5 lists $5/1M input and $25/1M output tokens on the cheapest tracked provider, while DeepSeek R1 lists $0.10/1M input and $0.30/1M output tokens on the cheapest tracked provider. A 70/30 input-output blend puts DeepSeek R1 lower by about $10.84 per million blended tokens. Availability is 6 providers versus 14, so concentration risk also matters.
Choose Claude Opus 4.5 when coding workflow support and larger context windows are central to the workload. Choose DeepSeek R1 when coding workflow support, 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 Opus 4.5 or DeepSeek R1?
Claude Opus 4.5 supports 200k tokens, while DeepSeek R1 supports 128k 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 Opus 4.5 or DeepSeek R1?
DeepSeek R1 is cheaper on tracked token pricing. Claude Opus 4.5 costs $5/1M input and $25/1M output tokens. DeepSeek R1 costs $0.10/1M input and $0.30/1M output tokens. Provider discounts or batch pricing can still change the final bill.
Is Claude Opus 4.5 or DeepSeek R1 open source?
Claude Opus 4.5 is listed under Proprietary. DeepSeek R1 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 Opus 4.5 or DeepSeek R1?
Claude Opus 4.5 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 Opus 4.5 or DeepSeek R1?
Claude Opus 4.5 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 Opus 4.5 and DeepSeek R1?
Claude Opus 4.5 is available on Microsoft Foundry, Anthropic, GCP Vertex AI, AWS Bedrock, and OpenRouter. DeepSeek R1 is available on DeepSeek Platform, OpenRouter, Together AI, Fireworks AI, and NVIDIA NIM. Provider coverage can affect latency, region availability, compliance posture, and fallback options.
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Last reviewed: 2026-05-22. Data sourced from public model cards and provider documentation.