Model Comparison

Claude Opus 4.5 vs Gemini 1.5 Flash 8BWhich is better in 2026?

Claude Opus 4.5 significantly outperforms across most benchmarks. Gemini 1.5 Flash 8B is 78.4x cheaper per token.

Verdict: Claude Opus 4.5 vs Gemini 1.5 Flash 8B — which is better?

Claude Opus 4.5 (by Anthropic) and Gemini 1.5 Flash 8B (by Google) 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.

Claude Opus 4.5 outperforms in 1 benchmarks (GPQA), while Gemini 1.5 Flash 8B is better at 0 benchmarks. Claude Opus 4.5 significantly outperforms across most benchmarks.

On price, Gemini 1.5 Flash 8B is roughly 78.4x cheaper per token on a blended 3:1 input/output basis, which adds up quickly at production volume.

Gemini 1.5 Flash 8B also accepts a larger context window (1,048,576 input tokens), making it the stronger choice for long documents and large codebases.

Choose Claude Opus 4.5 if…

  • you want the strongest raw capability — it leads on 1 of 1 shared benchmarks
  • you want the most recent training data — it shipped Nov 2025

Choose Gemini 1.5 Flash 8B if…

  • cost matters — it's about 78.4x cheaper per token
  • you process long inputs — it offers a 1,048,576 token context window
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Performance Benchmarks

Comparative analysis across standard metrics

1 benchmarks

Claude Opus 4.5 outperforms in 1 benchmarks (GPQA), while Gemini 1.5 Flash 8B is better at 0 benchmarks.

Claude Opus 4.5 significantly outperforms across most benchmarks.

Sun Jun 07 2026 • llm-stats.com

Arena Performance

Human preference votes

Pricing Analysis

Price comparison per million tokens

Gemini 1.5 Flash 8B costs less

For input processing, Claude Opus 4.5 ($5.00/1M tokens) is 71.4x more expensive than Gemini 1.5 Flash 8B ($0.07/1M tokens).

For output processing, Claude Opus 4.5 ($25.00/1M tokens) is 83.3x more expensive than Gemini 1.5 Flash 8B ($0.30/1M tokens).

In conclusion, Claude Opus 4.5 is more expensive than Gemini 1.5 Flash 8B.*

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

Lowest available price from all providers
Sun Jun 07 2026 • llm-stats.com
Anthropic
Claude Opus 4.5
Input tokens$5.00
Output tokens$25.00
Best providerAnthropic
Google
Gemini 1.5 Flash 8B
Input tokens$0.07
Output tokens$0.30
Best providerGoogle
Notice missing or incorrect data?Start an Issue→

Context Window

Maximum input and output token capacity

Gemini 1.5 Flash 8B accepts 1,048,576 input tokens compared to Claude Opus 4.5's 200,000 tokens. Claude Opus 4.5 can generate longer responses up to 64,000 tokens, while Gemini 1.5 Flash 8B is limited to 8,192 tokens.

Anthropic
Claude Opus 4.5
Input200,000 tokens
Output64,000 tokens
Google
Gemini 1.5 Flash 8B
Input1,048,576 tokens
Output8,192 tokens
Sun Jun 07 2026 • llm-stats.com

Input Capabilities

Supported data types and modalities

Both Claude Opus 4.5 and Gemini 1.5 Flash 8B support multimodal inputs.

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

Claude Opus 4.5

Text
Images
Audio
Video

Gemini 1.5 Flash 8B

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 Opus 4.5

Proprietary

Closed source

Gemini 1.5 Flash 8B

Proprietary

Closed source

Release Timeline

When each model was launched

Claude Opus 4.5 was released on 2025-11-24, while Gemini 1.5 Flash 8B was released on 2024-03-15.

Claude Opus 4.5 is 21 months newer than Gemini 1.5 Flash 8B.

Claude Opus 4.5

Nov 24, 2025

6 months ago

1.7yr newer
Gemini 1.5 Flash 8B

Mar 15, 2024

2.2 years ago

Knowledge Cutoff

When training data ends

Claude Opus 4.5 has a knowledge cutoff of 2025-03-31, while Gemini 1.5 Flash 8B has a cutoff of 2024-10-01.

Claude Opus 4.5 has more recent training data (up to 2025-03-31), making it potentially better informed about events through that date compared to Gemini 1.5 Flash 8B (2024-10-01).

Claude Opus 4.5

Mar 2025

5 mo newer
Gemini 1.5 Flash 8B

Oct 2024

Provider Availability

Claude Opus 4.5 is available from Anthropic. Gemini 1.5 Flash 8B is available from Google.

Claude Opus 4.5

anthropic logo
Anthropic
Input Price:Input: $5.00/1MOutput Price:Output: $25.00/1M

Gemini 1.5 Flash 8B

google logo
Google
Input Price:Input: $0.07/1MOutput Price:Output: $0.30/1M
* Prices shown are per million tokens

Outputs Comparison

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Key Takeaways

Anthropic
Higher GPQA score (87.0% vs 38.4%)
Google
Larger context window (1,048,576 tokens)
Less expensive input tokens
Less expensive output tokens
AnthropicClaude Opus 4.5
GoogleGemini 1.5 Flash 8B
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Detailed Comparison

AI Model Comparison Table
Feature
Anthropic
Claude Opus 4.5
Google
Gemini 1.5 Flash 8B

FAQ

Common questions about Claude Opus 4.5 vs Gemini 1.5 Flash 8B.

Which is better, Claude Opus 4.5 or Gemini 1.5 Flash 8B?

Claude Opus 4.5 significantly outperforms across most benchmarks. Claude Opus 4.5 is made by Anthropic and Gemini 1.5 Flash 8B is made by Google. The best choice depends on your use case — compare their benchmark scores, pricing, and capabilities above.

How does Claude Opus 4.5 compare to Gemini 1.5 Flash 8B in benchmarks?

Claude Opus 4.5 scores Tau2 Telecom: 98.2%, MMMLU: 90.8%, Tau2 Retail: 88.9%, GPQA: 87.0%, SWE-Bench Verified: 80.9%. Gemini 1.5 Flash 8B scores XSTest: 92.6%, FLEURS: 86.4%, Natural2Code: 75.5%, WMT23: 72.6%, Video-MME: 66.2%.

Is Claude Opus 4.5 cheaper than Gemini 1.5 Flash 8B?

Gemini 1.5 Flash 8B is 71.4x cheaper for input tokens. Claude Opus 4.5 costs $5.00/M input and $25.00/M output via anthropic. Gemini 1.5 Flash 8B costs $0.07/M input and $0.30/M output via google.

What are the context window sizes for Claude Opus 4.5 and Gemini 1.5 Flash 8B?

Claude Opus 4.5 supports 200K tokens and Gemini 1.5 Flash 8B supports 1.0M tokens. A larger context window lets you process longer documents, conversations, or codebases in a single request.

What are the main differences between Claude Opus 4.5 and Gemini 1.5 Flash 8B?

Key differences include context window (200K vs 1.0M), input pricing ($5.00 vs $0.07/M). See the full comparison above for benchmark-by-benchmark results.

Who makes Claude Opus 4.5 and Gemini 1.5 Flash 8B?

Claude Opus 4.5 is developed by Anthropic and Gemini 1.5 Flash 8B is developed by Google.

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