Claude Sonnet 4.6 vs Gemini 3.5 Flash
Anthropic's workhorse meets Google's fast mid-tier model. Both have 1M context — but Gemini is significantly cheaper. Find out which delivers better value.
Pricing data verified: Jun 10, 2026
| Specification | Claude Sonnet 4.6 (Anthropic) | Gemini 3.5 Flash (Google) |
|---|---|---|
| Input Price (per 1M tokens) | $3.00 | $1.50 |
| Output Price (per 1M tokens) | $15.00 | $9.00 |
| Context Window | 1M tokens | 1M tokens |
| Tier | Mid | Mid |
| Provider | Anthropic |
Calculate Your Exact Costs
Two mid-tier models with 1M context — see the real cost difference for your workload.
Other Mid-Tier Models
Which Model for Which Use Case?
Chatbots & Customer Support
High-volume conversational AI. Both handle multi-turn conversations well with 1M context. Gemini 3.5 Flash's 40% cheaper output pricing makes it the value winner for chat-heavy workloads.
Code Generation & Review
Mid-tier coding tasks: code completion, review, refactoring. Claude Sonnet 4.6's instruction-following precision gives it an edge for complex code tasks.
Document Analysis & Summarization
Processing long documents, extracting insights, generating summaries. Both have 1M context. Gemini 3.5 Flash is 50% cheaper on input — ideal for document-heavy workloads.
Data Extraction & Structured Output
Extracting structured data from unstructured text. Claude Sonnet 4.6 excels at precise structured output and JSON generation.
Comparing mid-tier workloads?
APIpulse Pro lets you compare all 39 models including GPT-5 mini and DeepSeek V4 Flash, save scenarios, and export cost reports for your team.
Frequently Asked Questions
Is Claude Sonnet 4.6 more expensive than Gemini 3.5 Flash?
Yes. Claude Sonnet 4.6 costs $3/$15 per 1M tokens. Gemini 3.5 Flash costs $1.50/$9 per 1M tokens. Gemini is 50% cheaper on input and 40% cheaper on output — a meaningful difference at scale.
Which has a larger context window?
Both Claude Sonnet 4.6 and Gemini 3.5 Flash offer 1M token context windows. They're equally capable for processing very long documents, codebases, or extended conversations.
When should I choose Claude Sonnet 4.6?
Choose Claude Sonnet 4.6 when you need Anthropic's instruction-following precision, nuanced reasoning, or structured output capabilities. It excels at complex analysis and precise code generation.
How do these compare to GPT-5 mini?
GPT-5 mini costs $0.25/$2 per 1M tokens — significantly cheaper than both. However, it has 272K context vs 1M. For budget workloads that don't need 1M context, GPT-5 mini is the cheapest option.