LLM Reference

Claude 3.7 Sonnet vs o3 Mini

Claude 3.7 Sonnet (2024) and o3 Mini (2025) are frontier-tier reasoning models from Anthropic and OpenAI. Claude 3.7 Sonnet ships a 200k-token context window, while o3 Mini ships a 200k-token context window. On MMLU PRO, Claude 3.7 Sonnet leads by 1.2 pts. On pricing, o3 Mini costs $1.10/1M 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.

o3 Mini is ~173% cheaper at $1.10/1M; pay for Claude 3.7 Sonnet only for coding workflow support.

Decision scorecard

Local evidence first
SignalClaude 3.7 Sonneto3 Mini
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 window200k200k
Cheapest output$15/1M tokens$4.40/1M tokens
Provider routes6 tracked4 tracked
Shared benchmarksMMLU PRO leader3 shared

Decision tradeoffs

Choose Claude 3.7 Sonnet when...
  • Claude 3.7 Sonnet holds a shared-benchmark lead on MMLU PRO, ahead by 1.2 points.
  • Claude 3.7 Sonnet has broader tracked provider coverage for fallback and route flexibility.
  • Claude 3.7 Sonnet uniquely exposes Vision and Multimodal in local model data.
  • Local decision data tags Claude 3.7 Sonnet for Coding, RAG, and Agents.
Choose o3 Mini when...
  • o3 Mini has the lower cheapest tracked output price at $4.40/1M tokens.
  • Local decision data tags o3 Mini 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 o3 Mini

Claude 3.7 Sonnet

$6,150

Cheapest tracked route/tier: GCP Vertex AI

o3 Mini

$1,980

Cheapest tracked route/tier: OpenRouter

Estimated monthly gap: $4,170. Batch, cache, alternate speed tiers, and negotiated pricing are excluded from this local estimate.

Switch friction

Claude 3.7 Sonnet -> o3 Mini
  • Provider overlap exists on OpenRouter; start route-level A/B tests there.
  • o3 Mini is $10.60/1M tokens lower on cheapest tracked output pricing before cache, batch, or negotiated discounts.
  • Check replacement coverage for Vision and Multimodal before moving production traffic.
o3 Mini -> Claude 3.7 Sonnet
  • Provider overlap exists on OpenRouter; start route-level A/B tests there.
  • Claude 3.7 Sonnet is $10.60/1M tokens higher on cheapest tracked output pricing, so quality gains need to justify the spend.
  • Claude 3.7 Sonnet adds Vision and Multimodal in local capability data.

Specs

Specification
Released2024-03-042025-01-31
Context window200k200k
Parameters——
ArchitectureDecoder OnlyDecoder Only
LicenseProprietaryProprietary
OpennessProprietaryProprietary
WeightsNot releasedNot released
CodeUnknownUnknown
Commercial useCommercial use: conditionalCommercial use: conditional
Knowledge cutoff2024-112025-04

Pricing and availability

Pricing attributeClaude 3.7 Sonneto3 Mini
Input price$3/1M tokens$1.10/1M tokens
Output price$15/1M tokens$4.40/1M tokens
Providers
Snowflake CortexGCP Vertex AIReplicate APIOpenRouterAWS BedrockAnthropic
OpenRouterAzure OpenAIOpenAI APIVercel AI Gateway

Capabilities

CapabilityClaude 3.7 Sonneto3 Mini
VisionYesNo
MultimodalYesNo
ReasoningYesYes
JSON / Tool useYesYes
Structured outputsYesYes
Code executionYesYes
IDE integrationNoNo
Computer useNoNo
Parallel agentsNoNo

Benchmarks

BenchmarkClaude 3.7 Sonneto3 Mini
MMLU PRO80.379.1
SWE-bench Verified70.349.3
Aider Polyglot64.960.4

Continue comparing

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