Claude Sonnet 4.5 vs Qwen3.6-Plus
Claude Sonnet 4.5 (2025) and Qwen3.6-Plus (2026) are agentic coding models from Anthropic and Alibaba. Claude Sonnet 4.5 ships a 200K-token context window, while Qwen3.6-Plus ships a 1M-token context window. On Massive Multi-discipline Multimodal Understanding, Qwen3.6-Plus leads by 8.2 pts. On pricing, Qwen3.6-Plus costs $0.33/1M input tokens versus $3/1M for the alternative. This comparison covers specs, pricing, capabilities, benchmarks, provider availability, and production fit.
Qwen3.6-Plus is ~823% cheaper at $0.33/1M; pay for Claude Sonnet 4.5 only for reasoning depth.
Decision scorecard
Local evidence first| Signal | Claude Sonnet 4.5 | Qwen3.6-Plus |
|---|---|---|
| Decision fit | RAG, Agents, and Long context | Coding, RAG, and Agents |
| Context window | 200K | 1M |
| Cheapest output | $15/1M tokens | $1.95/1M tokens |
| Provider routes | 7 tracked | 2 tracked |
| Shared benchmarks | 1 rows | Massive Multi-discipline Multimodal Understanding leader |
Decision tradeoffs
- Claude Sonnet 4.5 has broader tracked provider coverage for fallback and procurement flexibility.
- Claude Sonnet 4.5 uniquely exposes Reasoning and Structured outputs in local model data.
- Local decision data tags Claude Sonnet 4.5 for RAG, Agents, and Long context.
- Qwen3.6-Plus leads the largest shared benchmark signal on Massive Multi-discipline Multimodal Understanding by 8.2 points.
- Qwen3.6-Plus has the larger context window for long prompts, retrieval packs, or transcript analysis.
- Qwen3.6-Plus has the lower cheapest tracked output price at $1.95/1M tokens.
- Local decision data tags Qwen3.6-Plus for Coding, RAG, and Agents.
Monthly cost at traffic
Estimate token spend from the cheapest tracked input and output prices on this page.
Claude Sonnet 4.5
$6,150
Cheapest tracked route: Microsoft Foundry
Qwen3.6-Plus
$748
Cheapest tracked route: Alibaba Cloud PAI-EAS
Estimated monthly gap: $5,403. Batch, cache, and negotiated pricing are excluded from this local estimate.
Switch friction
- Provider overlap exists on OpenRouter; start route-level A/B tests there.
- Qwen3.6-Plus is $13.05/1M tokens lower on cheapest tracked output pricing before cache, batch, or negotiated discounts.
- Check replacement coverage for Reasoning and Structured outputs before moving production traffic.
- Provider overlap exists on OpenRouter; start route-level A/B tests there.
- Claude Sonnet 4.5 is $13.05/1M tokens higher on cheapest tracked output pricing, so quality gains need to justify the spend.
- Claude Sonnet 4.5 adds Reasoning and Structured outputs in local capability data.
Specs
| Specification | ||
|---|---|---|
| Released | 2025-09-29 | 2026-04-01 |
| Context window | 200K | 1M |
| Parameters | — | — |
| Architecture | decoder only | dense |
| License | Proprietary | Proprietary |
| Knowledge cutoff | 2025-12 | - |
Pricing and availability
| Pricing attribute | Claude Sonnet 4.5 | Qwen3.6-Plus |
|---|---|---|
| Input price | $3/1M tokens | $0.33/1M tokens |
| Output price | $15/1M tokens | $1.95/1M tokens |
| Providers |
Capabilities
| Capability | Claude Sonnet 4.5 | Qwen3.6-Plus |
|---|---|---|
| Vision | Yes | Yes |
| Multimodal | Yes | Yes |
| Reasoning | Yes | No |
| Function calling | Yes | Yes |
| Tool use | Yes | Yes |
| Structured outputs | Yes | No |
| Code execution | No | No |
Benchmarks
| Benchmark | Claude Sonnet 4.5 | Qwen3.6-Plus |
|---|---|---|
| Massive Multi-discipline Multimodal Understanding | 77.8 | 86.0 |
Deep dive
On shared benchmark coverage, Massive Multi-discipline Multimodal Understanding has Claude Sonnet 4.5 at 77.8 and Qwen3.6-Plus at 86, with Qwen3.6-Plus ahead by 8.2 points. The largest visible gap is 8.2 points on Massive Multi-discipline Multimodal Understanding, 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 reasoning mode: Claude Sonnet 4.5 and structured outputs: Claude Sonnet 4.5. Both models share vision, multimodal input, function calling, and tool use, 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 Sonnet 4.5 lists $3/1M input and $15/1M output tokens, while Qwen3.6-Plus lists $0.33/1M input and $1.95/1M output tokens on the cheapest tracked provider. A 70/30 input-output blend puts Qwen3.6-Plus lower by about $5.79 per million blended tokens. Availability is 7 providers versus 2, so concentration risk also matters.
Choose Claude Sonnet 4.5 when reasoning depth and broader provider choice are central to the workload. Choose Qwen3.6-Plus when coding workflow support, larger context windows, and lower input-token cost 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 Sonnet 4.5 or Qwen3.6-Plus?
Qwen3.6-Plus supports 1M tokens, while Claude Sonnet 4.5 supports 200K 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 Sonnet 4.5 or Qwen3.6-Plus?
Qwen3.6-Plus is cheaper on tracked token pricing. Claude Sonnet 4.5 costs $3/1M input and $15/1M output tokens. Qwen3.6-Plus costs $0.33/1M input and $1.95/1M output tokens. Provider discounts or batch pricing can still change the final bill.
Is Claude Sonnet 4.5 or Qwen3.6-Plus open source?
Claude Sonnet 4.5 is listed under Proprietary. Qwen3.6-Plus is listed under Proprietary. 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 Sonnet 4.5 or Qwen3.6-Plus?
Both Claude Sonnet 4.5 and Qwen3.6-Plus expose vision. The better choice depends on benchmark fit, context budget, pricing, and whether your provider route exposes the same capability surface. Use this as a quick comparison signal, then confirm the provider-specific limits before committing to production.
Which is better for multimodal input, Claude Sonnet 4.5 or Qwen3.6-Plus?
Both Claude Sonnet 4.5 and Qwen3.6-Plus expose multimodal input. The better choice depends on benchmark fit, context budget, pricing, and whether your provider route exposes the same capability surface. Use this as a quick comparison signal, then confirm the provider-specific limits before committing to production.
Where can I run Claude Sonnet 4.5 and Qwen3.6-Plus?
Claude Sonnet 4.5 is available on Microsoft Foundry, Anthropic, Snowflake Cortex, GCP Vertex AI, and AWS Bedrock. Qwen3.6-Plus is available on OpenRouter and Alibaba Cloud PAI-EAS. Provider coverage can affect latency, region availability, compliance posture, and fallback options.
Continue comparing
Last reviewed: 2026-05-16. Data sourced from public model cards and provider documentation.