Claude Mythos 5.1 vs Inkling-Small
Claude Mythos 5.1 leads the LLM Stats Score 45.1 to 38.5. Inkling-Small is 38.1x cheaper per token.
Anthropic · Thinking Machines Lab · Updated for 2026
Which is better?
Claude Mythos 5.1 leads the overall LLM Stats Score 45.1 to 38.5, ranking #33 overall.
On price, Inkling-Small is roughly 38.1x 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
- overall performance matters — it scores 45.1 and ranks #33 on LLM Stats
- your work emphasizes reasoning and coding — it leads those capability indexes
- you process long inputs — it offers a 1,000,000 token context window
- you want the most recent training data — it shipped Sep 2026
Choose Inkling-Small
- cost matters — it's about 38.1x cheaper per token
- you need open weights you can self-host or fine-tune
At a glance
The differences that matter most.
Individual benchmarks
1 reported for Claude Mythos 5.1 · 24 for Inkling-Small
Claude Mythos 5.1 and Inkling-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
For input processing, Claude Mythos 5.1 ($10.00/1M tokens) is 33.3x more expensive than Inkling-Small ($0.30/1M tokens).
For output processing, Claude Mythos 5.1 ($50.00/1M tokens) is 41.7x more expensive than Inkling-Small ($1.20/1M tokens).
In conclusion, Claude Mythos 5.1 is more expensive than Inkling-Small.*
* Using a 3:1 ratio of input to output tokens
Context Window
Maximum input and output token capacity
Claude Mythos 5.1 accepts 1,000,000 input tokens compared to Inkling-Small's 256,000 tokens. Inkling-Small can generate longer responses up to 256,000 tokens, while Claude Mythos 5.1 is limited to 128,000 tokens.
Input capabilities
Documented input modalities across available providers
Both Claude Mythos 5.1 and Inkling-Small support multimodal inputs.
They are both capable of processing various types of data, offering versatility in application.
Claude Mythos 5.1
Inkling-Small
License
Usage and distribution terms
Claude Mythos 5.1 is licensed under a proprietary license, while Inkling-Small uses Apache 2.0.
License differences may affect how you can use these models in commercial or open-source projects.
Proprietary
Closed source
Apache 2.0
Open weights
Release Timeline
When each model was launched
Claude Mythos 5.1 was released on 2026-09-01, while Inkling-Small was released on 2026-07-30.
Claude Mythos 5.1 is 1 month newer than Inkling-Small.
Sep 1, 2026
2 weeks ago
1mo newerJul 30, 2026
1 months ago
Knowledge Cutoff
When training data ends
Neither model specifies a knowledge cutoff date.
Unable to compare the recency of their training data.
Provider Availability
Claude Mythos 5.1 is available from Anthropic. Inkling-Small is available from Thinking Machines Lab, DeepInfra.
Claude Mythos 5.1
Inkling-Small
Outputs Comparison
Judge for yourself.
Run your own prompts against Claude Mythos 5.1 and Inkling-Small side-by-side, then vote on the output you prefer.
FAQ
Common questions about Claude Mythos 5.1 vs Inkling-Small.