Model Comparison

Claude Mythos Preview vs Gemini 3.5 Flash-LiteWhich is better in 2026?

Claude Mythos Preview significantly outperforms across most benchmarks. Gemini 3.5 Flash-Lite is 58.8x cheaper per token.

Verdict: Claude Mythos Preview vs Gemini 3.5 Flash-Lite — which is better?

Claude Mythos Preview (by Anthropic) and Gemini 3.5 Flash-Lite (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 Mythos Preview outperforms in 3 benchmarks (CharXiv-R, OSWorld-Verified, SWE-Bench Pro), while Gemini 3.5 Flash-Lite is better at 0 benchmarks. Claude Mythos Preview significantly outperforms across most benchmarks.

On price, Gemini 3.5 Flash-Lite is roughly 58.8x cheaper per token on a blended 3:1 input/output basis, which adds up quickly at production volume.

Choose Claude Mythos Preview if…

  • you want the strongest raw capability — it leads on 3 of 3 shared benchmarks

Choose Gemini 3.5 Flash-Lite if…

  • cost matters — it's about 58.8x cheaper per token

Performance Benchmarks

Comparative analysis across standard metrics

3 benchmarks

Claude Mythos Preview outperforms in 3 benchmarks (CharXiv-R, OSWorld-Verified, SWE-Bench Pro), while Gemini 3.5 Flash-Lite is better at 0 benchmarks.

Claude Mythos Preview significantly outperforms across most benchmarks.

Wed Jul 22 2026 • llm-stats.com

Arena Performance

Human preference votes

Pricing Analysis

Price comparison per million tokens

Gemini 3.5 Flash-Lite costs less

For input processing, Claude Mythos Preview ($25.00/1M tokens) is 83.3x more expensive than Gemini 3.5 Flash-Lite ($0.30/1M tokens).

For output processing, Claude Mythos Preview ($125.00/1M tokens) is 50.0x more expensive than Gemini 3.5 Flash-Lite ($2.50/1M tokens).

In conclusion, Claude Mythos Preview is more expensive than Gemini 3.5 Flash-Lite.*

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

Lowest available price from all providers
Wed Jul 22 2026 • llm-stats.com
Anthropic
Claude Mythos Preview
Input tokens$25.00
Output tokens$125.00
Best providerAnthropic
Google
Gemini 3.5 Flash-Lite
Input tokens$0.30
Output tokens$2.50
Best providerGoogle
Notice missing or incorrect data?Start an Issue→

Context Window

Maximum input and output token capacity

Only Gemini 3.5 Flash-Lite specifies input context (1,048,576 tokens). Only Gemini 3.5 Flash-Lite specifies output context (65,536 tokens).

Anthropic
Claude Mythos Preview
Input- tokens
Output- tokens
Google
Gemini 3.5 Flash-Lite
Input1,048,576 tokens
Output65,536 tokens
Wed Jul 22 2026 • llm-stats.com

Input Capabilities

Supported data types and modalities

Both Claude Mythos Preview and Gemini 3.5 Flash-Lite support multimodal inputs.

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

Claude Mythos Preview

Text
Images
Audio
Video

Gemini 3.5 Flash-Lite

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 Mythos Preview

Proprietary

Closed source

Gemini 3.5 Flash-Lite

Proprietary

Closed source

Release Timeline

When each model was launched

Gemini 3.5 Flash-Lite was released on 2026-07-21, while Claude Mythos Preview's release date is not specified.

We can confirm Gemini 3.5 Flash-Lite's release timeline, but cannot make a direct age comparison without Claude Mythos Preview's release date.

Claude Mythos Preview

—

Gemini 3.5 Flash-Lite

Jul 21, 2026

0 days ago

Knowledge Cutoff

When training data ends

Gemini 3.5 Flash-Lite has a documented knowledge cutoff of 2026-03-31, while Claude Mythos Preview's cutoff date is not specified.

We can confirm Gemini 3.5 Flash-Lite's training data extends to 2026-03-31, but cannot make a direct comparison without Claude Mythos Preview's cutoff date.

Claude Mythos Preview

—

Gemini 3.5 Flash-Lite

Mar 2026

Provider Availability

Claude Mythos Preview is available from Anthropic. Gemini 3.5 Flash-Lite is available from Google.

Claude Mythos Preview

anthropic logo
Anthropic
Input Price:Input: $25.00/1MOutput Price:Output: $125.00/1M

Gemini 3.5 Flash-Lite

google logo
Google
Input Price:Input: $0.30/1MOutput Price:Output: $2.50/1M
* Prices shown are per million tokens

Outputs Comparison

Notice missing or incorrect data?Start an Issue discussion→

Key Takeaways

Anthropic
Higher CharXiv-R score (93.2% vs 76.5%)
Higher OSWorld-Verified score (79.6% vs 74.0%)
Higher SWE-Bench Pro score (77.8% vs 54.2%)
Google
Larger context window (1,048,576 tokens)
Less expensive input tokens
Less expensive output tokens

Detailed Comparison

Interactive Arena

Judge for yourself.

Run your own prompts against Claude Mythos Preview and Gemini 3.5 Flash-Lite side-by-side, then vote on the output you prefer.

Claude Mythos Preview
✓ Preferred
Gemini 3.5 Flash-Lite
Open in Playground
AI Model Comparison Table
Feature
Anthropic
Claude Mythos Preview
Google
Gemini 3.5 Flash-Lite

FAQ

Common questions about Claude Mythos Preview vs Gemini 3.5 Flash-Lite.

Which is better, Claude Mythos Preview or Gemini 3.5 Flash-Lite?

Claude Mythos Preview significantly outperforms across most benchmarks. Claude Mythos Preview is made by Anthropic and Gemini 3.5 Flash-Lite is made by Google. The best choice depends on your use case — compare their benchmark scores, pricing, and capabilities above.

How does Claude Mythos Preview compare to Gemini 3.5 Flash-Lite in benchmarks?

Claude Mythos Preview scores CyBench: 100.0%, USAMO25: 97.6%, GPQA: 94.6%, SWE-Bench Verified: 93.9%, CharXiv-R: 93.2%. Gemini 3.5 Flash-Lite scores CharXiv-R: 76.5%, OSWorld-Verified: 74.0%, SWE-Bench Pro: 54.2%, Terminal-Bench 2.1: 54.0%, MLE-Bench: 39.2%.

Is Claude Mythos Preview cheaper than Gemini 3.5 Flash-Lite?

Gemini 3.5 Flash-Lite is 83.3x cheaper for input tokens. Claude Mythos Preview costs $25.00/M input and $125.00/M output via anthropic. Gemini 3.5 Flash-Lite costs $0.30/M input and $2.50/M output via google.

What are the context window sizes for Claude Mythos Preview and Gemini 3.5 Flash-Lite?

Claude Mythos Preview supports an unknown number of tokens and Gemini 3.5 Flash-Lite 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 Mythos Preview and Gemini 3.5 Flash-Lite?

Key differences include input pricing ($25.00 vs $0.30/M). See the full comparison above for benchmark-by-benchmark results.

Who makes Claude Mythos Preview and Gemini 3.5 Flash-Lite?

Claude Mythos Preview is developed by Anthropic and Gemini 3.5 Flash-Lite is developed by Google.

Related comparisons