The AI arena is free today

Open Superagent

Claude Mythos 5.2 vs ERNIE 5.5 Flash Preview

Claude Mythos 5.2 leads the LLM Stats Score 59.6 to 52.3. ERNIE 5.5 Flash Preview is 32.5x cheaper per token.

Anthropic · Baidu · Updated for 2026

Which is better?

Claude Mythos 5.2 leads the overall LLM Stats Score 59.6 to 52.3, ranking #2 overall.

In the 2 individual benchmarks reported for both models, Claude Mythos 5.2 wins 2; this is a narrower head-to-head signal than the composite indexes.

On price, ERNIE 5.5 Flash Preview is roughly 32.5x cheaper per token on a blended 3:1 input/output basis, which adds up quickly at production volume.

ERNIE 5.5 Flash Preview also accepts a larger context window (1,048,576 input tokens), making it the stronger choice for long documents and large codebases.

Based on current LLM Stats indexes, shared benchmarks, pricing, and model metadata for 2026.

Choose Claude Mythos 5.2

  • overall performance matters — it scores 59.6 and ranks #2 on LLM Stats
  • your work emphasizes coding and agents — it leads those capability indexes
  • you value its reported benchmark strengths — it wins 2 of 2 exact shared results

Choose ERNIE 5.5 Flash Preview

  • cost matters — it's about 32.5x cheaper per token
  • you process long inputs — it offers a 1,048,576 token context window
  • you want the most recent training data — it shipped Nov 2026

At a glance

The differences that matter most.

Claude Mythos 5.2
Anthropic
ERNIE 5.5 Flash Preview
Baidu
Core performance indexes
LLM Stats Score
59.6
#2
52.3
#13
Reasoning
53.6
#7
50.7
#12
Coding
44.6
#5
37.9
#20
Agents
44.1
#2
38.5
#11
Cost, coverage & limits
Benchmark wins
2 of 2
0 of 2
Input price
$8.00 / M
$0.28 / M
Output price
$40.00 / M
$1.13 / M
Context window
1,000,000
1,048,576

Capability indexes

Additional strengths measured across groups of related public benchmarks

1 shared
Index
Claude Mythos 5.2
ERNIE 5.5 Flash Preview
Tool use
38.5#1
32.2#8
Conservative TrueSkill rating · higher is betterHow scores work

Individual benchmarks

9 reported for Claude Mythos 5.2 · 13 for ERNIE 5.5 Flash Preview

2 shared

Claude Mythos 5.2 outperforms in 2 benchmarks (Terminal-Bench 4.0, Terminal-Bench-Science 0.1), while ERNIE 5.5 Flash Preview is better at 0 benchmarks.

Claude Mythos 5.2 significantly outperforms across most benchmarks.

Thu Nov 12 2026 • llm-stats.com

Human preference

Blind head-to-head votes and playground preference scores

Pricing Analysis

Price comparison per million tokens

ERNIE 5.5 Flash Preview costs less

For input processing, Claude Mythos 5.2 ($8.00/1M tokens) is 28.6x more expensive than ERNIE 5.5 Flash Preview ($0.28/1M tokens).

For output processing, Claude Mythos 5.2 ($40.00/1M tokens) is 35.4x more expensive than ERNIE 5.5 Flash Preview ($1.13/1M tokens).

In conclusion, Claude Mythos 5.2 is more expensive than ERNIE 5.5 Flash Preview.*

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

Lowest available price from all providers
Thu Nov 12 2026 • llm-stats.com
Anthropic
Claude Mythos 5.2
Input tokens$8.00
Output tokens$40.00
Best providerAnthropic
Baidu
ERNIE 5.5 Flash Preview
Input tokens$0.28
Output tokens$1.13
Best providerBaidu
Notice missing or incorrect data?

Context Window

Maximum input and output token capacity

ERNIE 5.5 Flash Preview accepts 1,048,576 input tokens compared to Claude Mythos 5.2's 1,000,000 tokens. ERNIE 5.5 Flash Preview can generate longer responses up to 1,048,576 tokens, while Claude Mythos 5.2 is limited to 128,000 tokens.

Anthropic
Claude Mythos 5.2
Input1,000,000 tokens
Output128,000 tokens
Baidu
ERNIE 5.5 Flash Preview
Input1,048,576 tokens
Output1,048,576 tokens
Thu Nov 12 2026 • llm-stats.com

Input capabilities

Documented input modalities across available providers

Claude Mythos 5.2 supports multimodal inputs, whereas ERNIE 5.5 Flash Preview does not.

Claude Mythos 5.2 can handle both text and other forms of data like images, making it suitable for multimodal applications.

Claude Mythos 5.2

Text
Images
Audio
Video

ERNIE 5.5 Flash 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.

Claude Mythos 5.2

Proprietary

Closed source

ERNIE 5.5 Flash Preview

Proprietary

Closed source

Release Timeline

When each model was launched

Claude Mythos 5.2 was released on 2026-11-09, while ERNIE 5.5 Flash Preview was released on 2026-11-11.

ERNIE 5.5 Flash Preview is 0 month newer than Claude Mythos 5.2.

Claude Mythos 5.2

Nov 9, 2026

3 days ago

ERNIE 5.5 Flash Preview

Nov 11, 2026

1 days ago

2d newer

Knowledge Cutoff

When training data ends

Claude Mythos 5.2 has a documented knowledge cutoff of 2026-06-01, while ERNIE 5.5 Flash Preview's cutoff date is not specified.

We can confirm Claude Mythos 5.2's training data extends to 2026-06-01, but cannot make a direct comparison without ERNIE 5.5 Flash Preview's cutoff date.

Claude Mythos 5.2

Jun 2026

ERNIE 5.5 Flash Preview

—

Provider Availability

Claude Mythos 5.2 is available from Anthropic. ERNIE 5.5 Flash Preview is available from Baidu Qianfan.

Claude Mythos 5.2

anthropic logo
Anthropic
Input Price:Input: $8.00/1MOutput Price:Output: $40.00/1M

ERNIE 5.5 Flash Preview

baidu logo
Baidu
Input Price:Input: $0.28/1MOutput Price:Output: $1.13/1M
* Prices shown are per million tokens

Outputs Comparison

Notice missing or incorrect data?

Judge for yourself.

Run your own prompts against Claude Mythos 5.2 and ERNIE 5.5 Flash Preview side-by-side, then vote on the output you prefer.

Claude Mythos 5.2
✓ Preferred
ERNIE 5.5 Flash Preview
Open in Playground

FAQ

Common questions about Claude Mythos 5.2 vs ERNIE 5.5 Flash Preview.

Which is better, Claude Mythos 5.2 or ERNIE 5.5 Flash Preview?

Claude Mythos 5.2 leads the LLM Stats Score 59.6 to 52.3. Claude Mythos 5.2 is made by Anthropic and ERNIE 5.5 Flash Preview is made by Baidu. The best choice depends on your use case — compare their capability indexes, individual benchmarks, pricing, and limits above.

How does Claude Mythos 5.2 compare to ERNIE 5.5 Flash Preview in benchmarks?

Claude Mythos 5.2 scores De novo protein binder design: 85.1%, Biomedical image analysis: 80.7%, Protocols Troubleshooting: 77.1%, Terminal-Bench-Science 0.1: 75.3%, Terminal-Bench 4.0: 70.5%. ERNIE 5.5 Flash Preview scores BrowseComp: 87.4%, DRACO: 84.9%, MCP Atlas: 84.6%, DeepSWE 1.1: 71.2%, OfficeQA Pro: 67.9%.

Is Claude Mythos 5.2 cheaper than ERNIE 5.5 Flash Preview?

ERNIE 5.5 Flash Preview is 28.6x cheaper for input tokens. Claude Mythos 5.2 costs $8.00/M input and $40.00/M output via anthropic. ERNIE 5.5 Flash Preview costs $0.28/M input and $1.13/M output via baidu.

What are the context window sizes for Claude Mythos 5.2 and ERNIE 5.5 Flash Preview?

Claude Mythos 5.2 supports 1.0M tokens and ERNIE 5.5 Flash Preview 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 5.2 and ERNIE 5.5 Flash Preview?

Key differences include LLM Stats Score (59.6 vs 52.3), context window (1.0M vs 1.0M), input pricing ($8.00 vs $0.28/M), multimodal support (yes vs no). See the full comparison above for benchmark-by-benchmark results.

Who makes Claude Mythos 5.2 and ERNIE 5.5 Flash Preview?

Claude Mythos 5.2 is developed by Anthropic and ERNIE 5.5 Flash Preview is developed by Baidu.

Related comparisons