Model Comparison

Gemini 3 Flash vs Claude Mythos PreviewWhich is better in 2026?

Claude Mythos Preview significantly outperforms across most benchmarks. Gemini 3 Flash is 44.4x cheaper per token.

Verdict: Gemini 3 Flash vs Claude Mythos Preview — which is better?

Gemini 3 Flash (by Google) and Claude Mythos Preview (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 0 benchmarks, while Claude Mythos Preview is better at 6 benchmarks (CharXiv-R, GPQA, Humanity's Last Exam, MMMLU, SWE-Bench Verified, Terminal-Bench 2.0). Claude Mythos Preview significantly outperforms across most benchmarks.

On price, Gemini 3 Flash is roughly 44.4x cheaper per token on a blended 3:1 input/output basis, which adds up quickly at production volume.

Choose Gemini 3 Flash if…

  • cost matters — it's about 44.4x cheaper per token

Choose Claude Mythos Preview if…

  • you want the strongest raw capability — it leads on 6 of 6 shared benchmarks

Performance Benchmarks

Comparative analysis across standard metrics

6 benchmarks

Gemini 3 Flash outperforms in 0 benchmarks, while Claude Mythos Preview is better at 6 benchmarks (CharXiv-R, GPQA, Humanity's Last Exam, MMMLU, SWE-Bench Verified, Terminal-Bench 2.0).

Claude Mythos Preview significantly outperforms across most benchmarks.

Mon Jul 06 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 50.0x cheaper than Claude Mythos Preview ($25.00/1M tokens).

For output processing, Gemini 3 Flash ($3.00/1M tokens) is 41.7x cheaper than Claude Mythos Preview ($125.00/1M tokens).

In conclusion, Claude Mythos Preview is more expensive than Gemini 3 Flash.*

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

Lowest available price from all providers
Mon Jul 06 2026 • llm-stats.com
Google
Gemini 3 Flash
Input tokens$0.50
Output tokens$3.00
Best providerGoogle
Anthropic
Claude Mythos Preview
Input tokens$25.00
Output tokens$125.00
Best providerAnthropic
Notice missing or incorrect data?Start an Issue→

Context Window

Maximum input and output token capacity

Only Gemini 3 Flash specifies input context (1,000,000 tokens). Only Gemini 3 Flash specifies output context (65,536 tokens).

Google
Gemini 3 Flash
Input1,000,000 tokens
Output65,536 tokens
Anthropic
Claude Mythos Preview
Input- tokens
Output- tokens
Mon Jul 06 2026 • llm-stats.com

Input Capabilities

Supported data types and modalities

Both Gemini 3 Flash and Claude Mythos Preview 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 Mythos Preview

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 Mythos Preview

Proprietary

Closed source

Release Timeline

When each model was launched

Gemini 3 Flash was released on 2025-12-17, while Claude Mythos Preview's release date is not specified.

We can confirm Gemini 3 Flash's release timeline, but cannot make a direct age comparison without Claude Mythos Preview's release date.

Gemini 3 Flash

Dec 17, 2025

6 months ago

Claude Mythos Preview

—

Knowledge Cutoff

When training data ends

Gemini 3 Flash has a documented knowledge cutoff of 2025-01-31, while Claude Mythos Preview'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 Mythos Preview's cutoff date.

Gemini 3 Flash

Jan 2025

Claude Mythos Preview

—

Provider Availability

Gemini 3 Flash is available from Google. Claude Mythos Preview is available from Anthropic.

Gemini 3 Flash

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

Claude Mythos Preview

anthropic logo
Anthropic
Input Price:Input: $25.00/1MOutput Price:Output: $125.00/1M
* 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
Anthropic
Higher CharXiv-R score (93.2% vs 80.3%)
Higher GPQA score (94.6% vs 90.4%)
Higher Humanity's Last Exam score (64.7% vs 43.5%)
Higher MMMLU score (92.7% vs 91.8%)
Higher SWE-Bench Verified score (93.9% vs 78.0%)
Higher Terminal-Bench 2.0 score (82.0% vs 47.6%)

Detailed Comparison

Interactive Arena

Judge for yourself.

Run your own prompts against Gemini 3 Flash and Claude Mythos Preview side-by-side, then vote on the output you prefer.

Gemini 3 Flash
✓ Preferred
Claude Mythos Preview
Open in Playground
AI Model Comparison Table
Feature
Google
Gemini 3 Flash
Anthropic
Claude Mythos Preview

FAQ

Common questions about Gemini 3 Flash vs Claude Mythos Preview.

Which is better, Gemini 3 Flash or Claude Mythos Preview?

Claude Mythos Preview significantly outperforms across most benchmarks. Gemini 3 Flash is made by Google and Claude Mythos Preview 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 Mythos Preview 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 Mythos Preview scores CyBench: 100.0%, USAMO25: 97.6%, GPQA: 94.6%, SWE-Bench Verified: 93.9%, CharXiv-R: 93.2%.

Is Gemini 3 Flash cheaper than Claude Mythos Preview?

Gemini 3 Flash is 50.0x cheaper for input tokens. Gemini 3 Flash costs $0.50/M input and $3.00/M output via google. Claude Mythos Preview costs $25.00/M input and $125.00/M output via anthropic.

What are the context window sizes for Gemini 3 Flash and Claude Mythos Preview?

Gemini 3 Flash supports 1.0M tokens and Claude Mythos Preview supports an unknown number of 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 Mythos Preview?

Key differences include input pricing ($0.50 vs $25.00/M). See the full comparison above for benchmark-by-benchmark results.

Who makes Gemini 3 Flash and Claude Mythos Preview?

Gemini 3 Flash is developed by Google and Claude Mythos Preview is developed by Anthropic.

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