Claude 3 Opus vs Gemini 1.5 Flash Comparison

Comparing Claude 3 Opus and Gemini 1.5 Flash across benchmarks, pricing, and capabilities.

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Performance Benchmarks

Comparative analysis across standard metrics

9 benchmarks

Claude 3 Opus outperforms in 7 benchmarks (BIG-Bench Hard, GSM8k, HellaSwag, HumanEval, MGSM, MMLU, MMLU-Pro), while Gemini 1.5 Flash is better at 2 benchmarks (GPQA, MATH).

Claude 3 Opus significantly outperforms across most benchmarks.

Mon Mar 16 2026 • llm-stats.com

Arena Performance

Human preference votes

Pricing Analysis

Price comparison per million tokens

Gemini 1.5 Flash costs less

For input processing, Claude 3 Opus ($15.00/1M tokens) is 100.0x more expensive than Gemini 1.5 Flash ($0.15/1M tokens).

For output processing, Claude 3 Opus ($75.00/1M tokens) is 125.0x more expensive than Gemini 1.5 Flash ($0.60/1M tokens).

In conclusion, Claude 3 Opus is more expensive than Gemini 1.5 Flash.*

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

Lowest available price from all providers

Mon Mar 16 2026 • llm-stats.com

Claude 3 Opus

Input tokens$15.00

Output tokens$75.00

Best providerAnthropic

Gemini 1.5 Flash

Input tokens$0.15

Output tokens$0.60

Best providerGoogle

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Context Window

Maximum input and output token capacity

Gemini 1.5 Flash accepts 1,048,576 input tokens compared to Claude 3 Opus's 200,000 tokens. Claude 3 Opus can generate longer responses up to 200,000 tokens, while Gemini 1.5 Flash is limited to 8,192 tokens.

Claude 3 Opus

Input200,000 tokens

Output200,000 tokens

Gemini 1.5 Flash

Input1,048,576 tokens

Output8,192 tokens

Mon Mar 16 2026 • llm-stats.com

Input Capabilities

Supported data types and modalities

Both Claude 3 Opus and Gemini 1.5 Flash support multimodal inputs.

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

Claude 3 Opus

Text

Images

Audio

Video

Gemini 1.5 Flash

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.

Claude 3 Opus

Proprietary

Closed source

Gemini 1.5 Flash

Proprietary

Closed source

Release Timeline

When each model was launched

Claude 3 Opus was released on 2024-02-29, while Gemini 1.5 Flash was released on 2024-05-01.

Gemini 1.5 Flash is 2 months newer than Claude 3 Opus.

Claude 3 Opus

Feb 29, 2024

2.0 years ago

Gemini 1.5 Flash

May 1, 2024

1.9 years ago

2mo newer

Knowledge Cutoff

When training data ends

Gemini 1.5 Flash has a documented knowledge cutoff of 2023-11-01, while Claude 3 Opus's cutoff date is not specified.

We can confirm Gemini 1.5 Flash's training data extends to 2023-11-01, but cannot make a direct comparison without Claude 3 Opus's cutoff date.

Claude 3 Opus

—

Gemini 1.5 Flash

Nov 2023

Provider Availability

Claude 3 Opus is available from Anthropic, Bedrock, Google. Gemini 1.5 Flash is available from Google. The availability of providers can affect quality of the model and reliability.