LLM Reference

Claude 3.7 Sonnet vs Qwen3.5-35B-A3B

Claude 3.7 Sonnet (2024) and Qwen3.5-35B-A3B (2026) are frontier-tier reasoning models from Anthropic and Alibaba. Claude 3.7 Sonnet ships a 200k-token context window, while Qwen3.5-35B-A3B ships a 262k-token context window. On MMLU PRO, Qwen3.5-35B-A3B leads by 5 pts. On pricing, Qwen3.5-35B-A3B costs $0.14/1M input tokens versus $3/1M 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.

Qwen3.5-35B-A3B is ~2058% cheaper at $0.14/1M; pay for Claude 3.7 Sonnet only for coding workflow support.

Decision scorecard

Local evidence first
SignalClaude 3.7 SonnetQwen3.5-35B-A3B
Best forreasoning-heavy apps, multimodal apps, and tool-calling agentsreasoning-heavy apps, tool-calling agents, and provider-routed production
Decision fitCoding, RAG, and AgentsCoding, RAG, and Agents
Context window200k262k
Cheapest output$15/1M tokens$1/1M tokens
Provider routes6 tracked2 tracked
Shared benchmarks3 sharedMMLU PRO leader

Decision tradeoffs

Choose Claude 3.7 Sonnet when...
  • Claude 3.7 Sonnet holds a shared-benchmark lead on SWE-bench Verified, ahead by 1.1 points.
  • Claude 3.7 Sonnet has broader tracked provider coverage for fallback and route flexibility.
  • Claude 3.7 Sonnet uniquely exposes Vision, Multimodal, and Code execution in local model data.
  • Local decision data tags Claude 3.7 Sonnet for Coding, RAG, and Agents.
Choose Qwen3.5-35B-A3B when...
  • Qwen3.5-35B-A3B holds a shared-benchmark lead on MMLU PRO, ahead by 5 points.
  • Qwen3.5-35B-A3B has the larger context window for long prompts, retrieval packs, or transcript analysis.
  • Qwen3.5-35B-A3B has the lower cheapest tracked output price at $1/1M tokens.
  • Local decision data tags Qwen3.5-35B-A3B 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.

Lower estimate Qwen3.5-35B-A3B

Claude 3.7 Sonnet

$6,150

Cheapest tracked route/tier: GCP Vertex AI

Qwen3.5-35B-A3B

$361

Cheapest tracked route/tier: OpenRouter

Estimated monthly gap: $5,789. Batch, cache, alternate speed tiers, and negotiated pricing are excluded from this local estimate.

Switch friction

Claude 3.7 Sonnet -> Qwen3.5-35B-A3B
  • Provider overlap exists on OpenRouter; start route-level A/B tests there.
  • Qwen3.5-35B-A3B is $14/1M 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.
Qwen3.5-35B-A3B -> Claude 3.7 Sonnet
  • Provider overlap exists on OpenRouter; start route-level A/B tests there.
  • Claude 3.7 Sonnet is $14/1M tokens higher on cheapest tracked output pricing, so quality gains need to justify the spend.
  • Claude 3.7 Sonnet adds Vision, Multimodal, and Code execution in local capability data.

Specs

Specification
Released2024-03-042026-02-24
Context window200k262k
Parameters—35B
ArchitectureDecoder OnlyMixture of Experts
LicenseProprietaryApache 2.0OSI-approved
OpennessProprietaryOpen source
WeightsNot releasedAvailable
CodeUnknownUnknown
Commercial useCommercial use: conditionalCommercial use: permitted
Knowledge cutoff2024-11-

Pricing and availability

Pricing attributeClaude 3.7 SonnetQwen3.5-35B-A3B
Input price$3/1M tokens$0.14/1M tokens
Output price$15/1M tokens$1/1M tokens
Providers
Snowflake CortexGCP Vertex AIReplicate APIOpenRouterAWS BedrockAnthropic
OpenRouterNovita AI

Capabilities

CapabilityClaude 3.7 SonnetQwen3.5-35B-A3B
VisionYesNo
MultimodalYesNo
ReasoningYesYes
JSON / Tool useYesYes
Structured outputsYesYes
Code executionYesNo
IDE integrationNoNo
Computer useNoNo
Parallel agentsNoNo

Benchmarks

BenchmarkClaude 3.7 SonnetQwen3.5-35B-A3B
MMLU PRO80.385.3
SWE-bench Verified70.369.2
LiveCodeBench68.974.6

Continue comparing

Model pages
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Last reviewed: 2026-07-26. Data sourced from public model cards and provider documentation.