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Claude Mythos 5.1 vs Inkling 2 Small

Claude Mythos 5.1 and Inkling 2 Small are closely matched at 43.0 and 47.1 on the LLM Stats Score. Inkling 2 Small is 42.1x cheaper per token.

Anthropic · Thinking Machines Lab · Updated for 2026

Which is better?

Claude Mythos 5.1 and Inkling 2 Small are closely matched on the overall LLM Stats Score at 43.0 and 47.1.

On price, Inkling 2 Small is roughly 42.1x cheaper per token on a blended 3:1 input/output basis, which adds up quickly at production volume.

Claude Mythos 5.1 also accepts a larger context window (1,000,000 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 5.1

  • you process long inputs — it offers a 1,000,000 token context window

Choose Inkling 2 Small

  • cost matters — it's about 42.1x cheaper per token
  • you want the most recent training data — it shipped Nov 2026

At a glance

The differences that matter most.

Claude Mythos 5.1
Anthropic
Inkling 2 Small
Thinking Machines Lab
Core performance indexes
LLM Stats Score
43.0
#62
47.1
#41
Reasoning
41.8
#64
47.8
#26
Coding
35.2
#38
36.2
#35
Agents
33.3
#38
33.3
#39
Cost, coverage & limits
Benchmark wins
—
—
Input price
$10.00 / M
$0.30 / M
Output price
$50.00 / M
$1.00 / M
Context window
1,000,000
256,000

Individual benchmarks

1 reported for Claude Mythos 5.1 · 11 for Inkling 2 Small

No common benchmarks found

Claude Mythos 5.1 and Inkling 2 Smalldon't have any common benchmark datasets to compare. They may have been evaluated on different testing suites.

Human preference

Blind head-to-head votes and playground preference scores

Pricing Analysis

Price comparison per million tokens

Inkling 2 Small costs less

For input processing, Claude Mythos 5.1 ($10.00/1M tokens) is 33.3x more expensive than Inkling 2 Small ($0.30/1M tokens).

For output processing, Claude Mythos 5.1 ($50.00/1M tokens) is 50.0x more expensive than Inkling 2 Small ($1.00/1M tokens).

In conclusion, Claude Mythos 5.1 is more expensive than Inkling 2 Small.*

* 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 5.1
Input tokens$10.00
Output tokens$50.00
Best providerAnthropic
Thinking Machines Lab
Inkling 2 Small
Input tokens$0.30
Output tokens$1.00
Best providerUnknown Organization
Notice missing or incorrect data?

Context Window

Maximum input and output token capacity

Claude Mythos 5.1 accepts 1,000,000 input tokens compared to Inkling 2 Small's 256,000 tokens. Only Claude Mythos 5.1 specifies output context (128,000 tokens).

Anthropic
Claude Mythos 5.1
Input1,000,000 tokens
Output128,000 tokens
Thinking Machines Lab
Inkling 2 Small
Input256,000 tokens
Output- tokens
Thu Nov 12 2026 • llm-stats.com

Input capabilities

Documented input modalities across available providers

Both Claude Mythos 5.1 and Inkling 2 Small support multimodal inputs.

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

Claude Mythos 5.1

Text
Images
Audio
Video

Inkling 2 Small

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 5.1

Proprietary

Closed source

Inkling 2 Small

Proprietary

Closed source

Release Timeline

When each model was launched

Claude Mythos 5.1 was released on 2026-09-01, while Inkling 2 Small was released on 2026-11-05.

Inkling 2 Small is 2 months newer than Claude Mythos 5.1.

Claude Mythos 5.1

Sep 1, 2026

2 months ago

Inkling 2 Small

Nov 5, 2026

1 weeks ago

2mo newer

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 5.1 is available from Anthropic. Inkling 2 Small is available from Thinking Machines Lab.

Claude Mythos 5.1

anthropic logo
Anthropic
Input Price:Input: $10.00/1MOutput Price:Output: $50.00/1M

Inkling 2 Small

thinking-machines logo
Unknown Organization
Input Price:Input: $0.30/1MOutput Price:Output: $1.00/1M
* Prices shown are per million tokens

Outputs Comparison

Notice missing or incorrect data?

Judge for yourself.

Run your own prompts against Claude Mythos 5.1 and Inkling 2 Small side-by-side, then vote on the output you prefer.

Claude Mythos 5.1
✓ Preferred
Inkling 2 Small
Open in Playground

FAQ

Common questions about Claude Mythos 5.1 vs Inkling 2 Small.

Which is better, Claude Mythos 5.1 or Inkling 2 Small?

Claude Mythos 5.1 and Inkling 2 Small are closely matched on the LLM Stats Score at 43.0 and 47.1. Claude Mythos 5.1 is made by Anthropic and Inkling 2 Small is made by Thinking Machines Lab. The best choice depends on your use case — compare their capability indexes, individual benchmarks, pricing, and limits above.

How does Claude Mythos 5.1 compare to Inkling 2 Small in benchmarks?

Claude Mythos 5.1 scores Terminal-Bench 4.0: 60.9%. Inkling 2 Small scores GPQA: 93.0%, BrowseComp: 90.2%, CharXiv-R: 85.6%, MCP Atlas: 85.0%, SWE-Bench Verified: 82.2%.

Is Claude Mythos 5.1 cheaper than Inkling 2 Small?

Inkling 2 Small is 33.3x cheaper for input tokens. Claude Mythos 5.1 costs $10.00/M input and $50.00/M output via anthropic. Inkling 2 Small costs $0.30/M input and $1.00/M output via thinking-machines.

What are the context window sizes for Claude Mythos 5.1 and Inkling 2 Small?

Claude Mythos 5.1 supports 1.0M tokens and Inkling 2 Small supports 256K 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 5.1 and Inkling 2 Small?

Key differences include LLM Stats Score (43.0 vs 47.1), context window (1.0M vs 256K), input pricing ($10.00 vs $0.30/M). See the full comparison above for benchmark-by-benchmark results.

Who makes Claude Mythos 5.1 and Inkling 2 Small?

Claude Mythos 5.1 is developed by Anthropic and Inkling 2 Small is developed by Thinking Machines Lab.

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