Claude Sonnet 4.5 vs Qwen3.6-27B

Claude Sonnet 4.5 (2025) and Qwen3.6-27B (2026) compare a standalone API model against a coding-specialized model. Claude Sonnet 4.5 ships a 200k-token context window, while Qwen3.6-27B ships a 262k-token context window. On MMLU PRO, Qwen3.6-27B leads by 0.2 pts. On pricing, Claude Sonnet 4.5 ranges from $3 to $6/1M input tokens by tier; Qwen3.6-27B costs $0.32/1M input tokens. This page treats the result as workflow and deployment fit, not a universal model winner.

Treat this as a product-type comparison: Claude Sonnet 4.5 is standalone API model, while Qwen3.6-27B is coding-specialized model. Choose based on workflow fit before reading any benchmark or price row as decisive.

Decision scorecard

Local evidence first
SignalClaude Sonnet 4.5Qwen3.6-27B
Product typeStandalone API modelCoding-specialized model
Best forreasoning-heavy apps, multimodal apps, and tool-calling agentscustom coding agents, code generation, and tool loops
Decision fitCoding, RAG, and AgentsCoding, RAG, and Agents
Context window200k262k
Cheapest output$15/1M tokens$3.20/1M tokens
Provider routes8 tracked5 tracked
Shared benchmarks4 sharedMMLU PRO leader

Decision tradeoffs

Choose Claude Sonnet 4.5 when...
  • Claude Sonnet 4.5 has broader tracked provider coverage for fallback and route flexibility.
  • Claude Sonnet 4.5 uniquely exposes Structured outputs in local model data.
  • Local decision data tags Claude Sonnet 4.5 for Coding, RAG, and Agents.
Choose Qwen3.6-27B when...
  • Qwen3.6-27B holds a shared-benchmark lead on MMLU PRO, ahead by 0.2 points.
  • Qwen3.6-27B has the larger context window for long prompts, retrieval packs, or transcript analysis.
  • Qwen3.6-27B has the lower cheapest tracked output price at $3.20/1M tokens.
  • Local decision data tags Qwen3.6-27B 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 Qwen3.6-27B

Claude Sonnet 4.5

$6,150

Cheapest tracked route/tier: Microsoft Foundry

Qwen3.6-27B

$1,056

Cheapest tracked route/tier: OpenRouter

Estimated monthly gap: $5,094. Batch, cache, alternate speed tiers, and negotiated pricing are excluded from this local estimate.

Switch friction

Claude Sonnet 4.5 -> Qwen3.6-27B
  • Provider overlap exists on OpenRouter and Vercel AI Gateway; start route-level A/B tests there.
  • Qwen3.6-27B is $11.80/1M tokens lower on cheapest tracked output pricing before cache, batch, or negotiated discounts.
  • Check replacement coverage for Structured outputs before moving production traffic.
Qwen3.6-27B -> Claude Sonnet 4.5
  • Provider overlap exists on OpenRouter and Vercel AI Gateway; start route-level A/B tests there.
  • Claude Sonnet 4.5 is $11.80/1M tokens higher on cheapest tracked output pricing, so quality gains need to justify the spend.
  • Claude Sonnet 4.5 adds Structured outputs in local capability data.

Specs

Specification
Released2025-09-292026-04-27
Context window200k262k
Parameters—27B
ArchitectureDecoder OnlyDecoder Only
LicenseProprietaryApache 2.0OSI-approved
OpennessProprietaryOpen source
WeightsNot releasedAvailable
CodeUnknownUnknown
Commercial useCommercial use: conditionalCommercial use: permitted
Knowledge cutoff2025-12-

Pricing and availability

Pricing attributeClaude Sonnet 4.5Qwen3.6-27B
Input price
0-200,001t
$3/1M tokens
200,001t+
$6/1M tokens
$0.32/1M tokens
Output price
0-200,001t
$15/1M tokens
200,001t+
$22.50/1M tokens
$3.20/1M tokens
Providers
Microsoft FoundryAnthropicSnowflake CortexGCP Vertex AIAWS BedrockReplicate API
OpenRouterAlibaba Cloud PAI-EASVercel AI GatewayNovita AIFeatherless

Capabilities

CapabilityClaude Sonnet 4.5Qwen3.6-27B
VisionYesYes
MultimodalYesYes
ReasoningYesYes
JSON / Tool useYesYes
Structured outputsYesNo
Code executionNoNo
IDE integrationNoNo
Computer useNoNo
Parallel agentsNoNo

Benchmarks

BenchmarkClaude Sonnet 4.5Qwen3.6-27B
MMLU PRO86.086.2
SWE-bench Verified77.277.2
Google-Proof Q&A83.487.8
MMMU Pro68.975.8

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Last reviewed: 2026-10-09. Data sourced from public model cards and provider documentation.