Model Comparison

Gemini 3 Flash vs Claude Sonnet 4.6Which is better in 2026?

Claude Sonnet 4.6 shows notably better performance in the majority of benchmarks. Gemini 3 Flash is 5.3x cheaper per token.

Verdict: Gemini 3 Flash vs Claude Sonnet 4.6 — which is better?

Gemini 3 Flash (by Google) and Claude Sonnet 4.6 (by Anthropic) are two of the AI models people compare most. Here is how they stack up on benchmarks, price and capabilities, and which one to pick in 2026.

Gemini 3 Flash outperforms in 3 benchmarks (GPQA, MMMLU, MMMU-Pro), while Claude Sonnet 4.6 is better at 8 benchmarks (ARC-AGI v2, Finance Agent v2, Humanity's Last Exam, Legal Agent Benchmark, LiveBench, MCP Atlas, SWE-Bench Verified, Terminal-Bench 2.0). Claude Sonnet 4.6 shows notably better performance in the majority of benchmarks.

On price, Gemini 3 Flash is roughly 5.3x cheaper per token on a blended 3:1 input/output basis, which adds up quickly at production volume.

Gemini 3 Flash also accepts a larger context window (1,000,000 input tokens), making it the stronger choice for long documents and large codebases.

Choose Gemini 3 Flash if…

  • cost matters — it's about 5.3x cheaper per token
  • you process long inputs — it offers a 1,000,000 token context window

Choose Claude Sonnet 4.6 if…

  • you want the strongest raw capability — it leads on 8 of 11 shared benchmarks
  • you want the most recent training data — it shipped Feb 2026
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Performance Benchmarks

Comparative analysis across standard metrics

11 benchmarks

Gemini 3 Flash outperforms in 3 benchmarks (GPQA, MMMLU, MMMU-Pro), while Claude Sonnet 4.6 is better at 8 benchmarks (ARC-AGI v2, Finance Agent v2, Humanity's Last Exam, Legal Agent Benchmark, LiveBench, MCP Atlas, SWE-Bench Verified, Terminal-Bench 2.0).

Claude Sonnet 4.6 shows notably better performance in the majority of benchmarks.

Thu Jun 25 2026 • llm-stats.com

Arena Performance

Human preference votes

Pricing Analysis

Price comparison per million tokens

Gemini 3 Flash costs less

For input processing, Gemini 3 Flash ($0.50/1M tokens) is 6.0x cheaper than Claude Sonnet 4.6 ($3.00/1M tokens).

For output processing, Gemini 3 Flash ($3.00/1M tokens) is 5.0x cheaper than Claude Sonnet 4.6 ($15.00/1M tokens).

In conclusion, Claude Sonnet 4.6 is more expensive than Gemini 3 Flash.*

* Using a 3:1 ratio of input to output tokens

Lowest available price from all providers
Thu Jun 25 2026 • llm-stats.com
Google
Gemini 3 Flash
Input tokens$0.50
Output tokens$3.00
Best providerGoogle
Anthropic
Claude Sonnet 4.6
Input tokens$3.00
Output tokens$15.00
Best providerAnthropic
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Context Window

Maximum input and output token capacity

Gemini 3 Flash accepts 1,000,000 input tokens compared to Claude Sonnet 4.6's 200,000 tokens. Gemini 3 Flash can generate longer responses up to 65,536 tokens, while Claude Sonnet 4.6 is limited to 64,000 tokens.

Google
Gemini 3 Flash
Input1,000,000 tokens
Output65,536 tokens
Anthropic
Claude Sonnet 4.6
Input200,000 tokens
Output64,000 tokens
Thu Jun 25 2026 • llm-stats.com

Input Capabilities

Supported data types and modalities

Both Gemini 3 Flash and Claude Sonnet 4.6 support multimodal inputs.

They are both capable of processing various types of data, offering versatility in application.

Gemini 3 Flash

Text
Images
Audio
Video

Claude Sonnet 4.6

Text
Images
Audio
Video

License

Usage and distribution terms

Both models are licensed under proprietary licenses.

Both models have usage restrictions defined by their respective organizations.

Gemini 3 Flash

Proprietary

Closed source

Claude Sonnet 4.6

Proprietary

Closed source

Release Timeline

When each model was launched

Gemini 3 Flash was released on 2025-12-17, while Claude Sonnet 4.6 was released on 2026-02-17.

Claude Sonnet 4.6 is 2 months newer than Gemini 3 Flash.

Gemini 3 Flash

Dec 17, 2025

6 months ago

Claude Sonnet 4.6

Feb 17, 2026

4 months ago

2mo newer

Knowledge Cutoff

When training data ends

Gemini 3 Flash has a documented knowledge cutoff of 2025-01-31, while Claude Sonnet 4.6's cutoff date is not specified.

We can confirm Gemini 3 Flash's training data extends to 2025-01-31, but cannot make a direct comparison without Claude Sonnet 4.6's cutoff date.

Gemini 3 Flash

Jan 2025

Claude Sonnet 4.6

—

Provider Availability

Gemini 3 Flash is available from Google. Claude Sonnet 4.6 is available from Anthropic.

Gemini 3 Flash

google logo
Google
Input Price:Input: $0.50/1MOutput Price:Output: $3.00/1M

Claude Sonnet 4.6

anthropic logo
Anthropic
Input Price:Input: $3.00/1MOutput Price:Output: $15.00/1M
* Prices shown are per million tokens

Outputs Comparison

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Key Takeaways

Google
Larger context window (1,000,000 tokens)
Less expensive input tokens
Less expensive output tokens
Higher GPQA score (90.4% vs 89.9%)
Higher MMMLU score (91.8% vs 89.3%)
Higher MMMU-Pro score (81.2% vs 75.6%)
Anthropic
Higher ARC-AGI v2 score (58.3% vs 33.6%)
Higher Finance Agent v2 score (51.0% vs 42.5%)
Higher Humanity's Last Exam score (49.0% vs 43.5%)
Higher Legal Agent Benchmark score (5.4% vs 0.0%)
Higher LiveBench score (75.5% vs 72.4%)
Higher MCP Atlas score (61.3% vs 57.4%)
Higher SWE-Bench Verified score (79.6% vs 78.0%)
Higher Terminal-Bench 2.0 score (59.1% vs 47.6%)

Detailed Comparison

AI Model Comparison Table
Feature
Google
Gemini 3 Flash
Anthropic
Claude Sonnet 4.6

FAQ

Common questions about Gemini 3 Flash vs Claude Sonnet 4.6.

Which is better, Gemini 3 Flash or Claude Sonnet 4.6?

Claude Sonnet 4.6 shows notably better performance in the majority of benchmarks. Gemini 3 Flash is made by Google and Claude Sonnet 4.6 is made by Anthropic. The best choice depends on your use case — compare their benchmark scores, pricing, and capabilities above.

How does Gemini 3 Flash compare to Claude Sonnet 4.6 in benchmarks?

Gemini 3 Flash scores Vending-Bench 2: 100.0%, AIME 2025: 99.7%, Global PIQA: 92.8%, MMMLU: 91.8%, GPQA: 90.4%. Claude Sonnet 4.6 scores Tau2 Telecom: 97.9%, Tau2 Retail: 91.7%, GPQA: 89.9%, MMMLU: 89.3%, SWE-Bench Verified: 79.6%.

Is Gemini 3 Flash cheaper than Claude Sonnet 4.6?

Gemini 3 Flash is 6.0x cheaper for input tokens. Gemini 3 Flash costs $0.50/M input and $3.00/M output via google. Claude Sonnet 4.6 costs $3.00/M input and $15.00/M output via anthropic.

What are the context window sizes for Gemini 3 Flash and Claude Sonnet 4.6?

Gemini 3 Flash supports 1.0M tokens and Claude Sonnet 4.6 supports 200K tokens. A larger context window lets you process longer documents, conversations, or codebases in a single request.

What are the main differences between Gemini 3 Flash and Claude Sonnet 4.6?

Key differences include context window (1.0M vs 200K), input pricing ($0.50 vs $3.00/M). See the full comparison above for benchmark-by-benchmark results.

Who makes Gemini 3 Flash and Claude Sonnet 4.6?

Gemini 3 Flash is developed by Google and Claude Sonnet 4.6 is developed by Anthropic.

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