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Claude Mythos Preview vs DeepSeek-V4-Flash-Vision-Exp

Comparing Claude Mythos Preview and DeepSeek-V4-Flash-Vision-Exp across benchmarks, pricing, and capabilities.

Anthropic · DeepSeek · Updated for 2026

Which is better?

Claude Mythos Preview and DeepSeek-V4-Flash-Vision-Exp trade strengths across price, capabilities, and technical limits. The better choice depends on the workload.

On price, DeepSeek-V4-Flash-Vision-Exp is roughly 151.5x cheaper per token on a blended 3:1 input/output basis, which adds up quickly at production volume.

Based on current benchmark, pricing, and model metadata for 2026.

Choose Claude Mythos Preview

  • you want predictable pricing at $25.00/M input and $125.00/M output

Choose DeepSeek-V4-Flash-Vision-Exp

  • cost matters — it's about 151.5x cheaper per token

At a glance

The differences that matter most.

Claude Mythos Preview
Anthropic
DeepSeek-V4-Flash-Vision-Exp
DeepSeek
Benchmark wins
—
—
Input price
$25.00 / M
$0.22 / M
Output price
$125.00 / M
$0.66 / M
Context window
—
1,048,576
Released
—
Aug 2026
License
Proprietary
Unknown

Performance Benchmarks

Comparative analysis across standard metrics

No common benchmarks found

Claude Mythos Preview and DeepSeek-V4-Flash-Vision-Expdon't have any common benchmark datasets to compare. They may have been evaluated on different testing suites.

Arena Performance

Playground indexes and blind preference scores

Pricing Analysis

Price comparison per million tokens

DeepSeek-V4-Flash-Vision-Exp costs less

For input processing, Claude Mythos Preview ($25.00/1M tokens) is 113.6x more expensive than DeepSeek-V4-Flash-Vision-Exp ($0.22/1M tokens).

For output processing, Claude Mythos Preview ($125.00/1M tokens) is 189.4x more expensive than DeepSeek-V4-Flash-Vision-Exp ($0.66/1M tokens).

In conclusion, Claude Mythos Preview is more expensive than DeepSeek-V4-Flash-Vision-Exp.*

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

Lowest available price from all providers
Tue Aug 25 2026 • llm-stats.com
Anthropic
Claude Mythos Preview
Input tokens$25.00
Output tokens$125.00
Best providerAnthropic
DeepSeek
DeepSeek-V4-Flash-Vision-Exp
Input tokens$0.22
Output tokens$0.66
Best providerDeepSeek
Notice missing or incorrect data?Start an Issue→

Context Window

Maximum input and output token capacity

Only DeepSeek-V4-Flash-Vision-Exp specifies input context (1,048,576 tokens). Only DeepSeek-V4-Flash-Vision-Exp specifies output context (393,216 tokens).

Anthropic
Claude Mythos Preview
Input- tokens
Output- tokens
DeepSeek
DeepSeek-V4-Flash-Vision-Exp
Input1,048,576 tokens
Output393,216 tokens
Tue Aug 25 2026 • llm-stats.com

Input Capabilities

Supported data types and modalities

Both Claude Mythos Preview and DeepSeek-V4-Flash-Vision-Exp support multimodal inputs.

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

Claude Mythos Preview

Text
Images
Audio
Video

DeepSeek-V4-Flash-Vision-Exp

Text
Images
Audio
Video

Release Timeline

When each model was launched

DeepSeek-V4-Flash-Vision-Exp was released on 2026-08-21, while Claude Mythos Preview's release date is not specified.

We can confirm DeepSeek-V4-Flash-Vision-Exp's release timeline, but cannot make a direct age comparison without Claude Mythos Preview's release date.

Claude Mythos Preview

—

DeepSeek-V4-Flash-Vision-Exp

Aug 21, 2026

3 days ago

Knowledge Cutoff

When training data ends

Neither model specifies a knowledge cutoff date.

Unable to compare the recency of their training data.

No cutoff dates available

Provider Availability

Claude Mythos Preview is available from Anthropic. DeepSeek-V4-Flash-Vision-Exp is available from DeepSeek.

Claude Mythos Preview

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

DeepSeek-V4-Flash-Vision-Exp

deepseek logo
DeepSeek
Input Price:Input: $0.22/1MOutput Price:Output: $0.66/1M
* Prices shown are per million tokens

Outputs Comparison

Notice missing or incorrect data?Start an Issue discussion→

Judge for yourself.

Run your own prompts against Claude Mythos Preview and DeepSeek-V4-Flash-Vision-Exp side-by-side, then vote on the output you prefer.

Claude Mythos Preview
✓ Preferred
DeepSeek-V4-Flash-Vision-Exp
Open in Playground

FAQ

Common questions about Claude Mythos Preview vs DeepSeek-V4-Flash-Vision-Exp.

Which is better, Claude Mythos Preview or DeepSeek-V4-Flash-Vision-Exp?

Claude Mythos Preview (Anthropic) and DeepSeek-V4-Flash-Vision-Exp (DeepSeek) each have strengths in different areas. Compare their benchmark scores, pricing, context windows, and capabilities above to determine which fits your needs.

How does Claude Mythos Preview compare to DeepSeek-V4-Flash-Vision-Exp in benchmarks?

Claude Mythos Preview scores CyBench: 100.0%, USAMO25: 97.6%, GPQA: 94.6%, SWE-Bench Verified: 93.9%, CharXiv-R: 93.2%. DeepSeek-V4-Flash-Vision-Exp scores Terminal-Bench 2.1: 83.9%, DSBench-Hard: 63.6%, DeepSWE: 59.3%, NL2Repo: 57.7%, ZEROBench: 35.0%.

Is Claude Mythos Preview cheaper than DeepSeek-V4-Flash-Vision-Exp?

DeepSeek-V4-Flash-Vision-Exp is 113.6x cheaper for input tokens. Claude Mythos Preview costs $25.00/M input and $125.00/M output via anthropic. DeepSeek-V4-Flash-Vision-Exp costs $0.22/M input and $0.66/M output via deepseek.

What are the context window sizes for Claude Mythos Preview and DeepSeek-V4-Flash-Vision-Exp?

Claude Mythos Preview supports an unknown number of tokens and DeepSeek-V4-Flash-Vision-Exp 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 DeepSeek-V4-Flash-Vision-Exp?

Key differences include input pricing ($25.00 vs $0.22/M), licensing (Proprietary vs Unknown). See the full comparison above for benchmark-by-benchmark results.

Who makes Claude Mythos Preview and DeepSeek-V4-Flash-Vision-Exp?

Claude Mythos Preview is developed by Anthropic and DeepSeek-V4-Flash-Vision-Exp is developed by DeepSeek.

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