GPT-5.6 Sol vs Inkling 2 Small
GPT-5.6 Sol and Inkling 2 Small are closely matched at 52.5 and 47.2 on the LLM Stats Score. Inkling 2 Small is 23.7x cheaper per token.
OpenAI · Thinking Machines Lab · Updated for 2026
Which is better?
GPT-5.6 Sol and Inkling 2 Small are closely matched on the overall LLM Stats Score at 52.5 and 47.2.
In the 4 individual benchmarks reported for both models, GPT-5.6 Sol wins 4; this is a narrower head-to-head signal than the composite indexes.
On price, Inkling 2 Small is roughly 23.7x cheaper per token on a blended 3:1 input/output basis, which adds up quickly at production volume.
GPT-5.6 Sol also accepts a larger context window (1,050,000 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 GPT-5.6 Sol
- you value its reported benchmark strengths — it wins 4 of 4 exact shared results
- you process long inputs — it offers a 1,050,000 token context window
Choose Inkling 2 Small
- cost matters — it's about 23.7x cheaper per token
- you want the most recent training data — it shipped Nov 2026
At a glance
The differences that matter most.
Capability indexes
Additional strengths measured across groups of related public benchmarks
Individual benchmarks
46 reported for GPT-5.6 Sol · 11 for Inkling 2 Small
GPT-5.6 Sol outperforms in 4 benchmarks (Artificial Analysis, BrowseComp, GPQA, MMMU-Pro), while Inkling 2 Small is better at 0 benchmarks.
GPT-5.6 Sol significantly outperforms across most benchmarks.
Human preference
Blind head-to-head votes and playground preference scores
Pricing Analysis
Price comparison per million tokens
For input processing, GPT-5.6 Sol ($5.00/1M tokens) is 16.7x more expensive than Inkling 2 Small ($0.30/1M tokens).
For output processing, GPT-5.6 Sol ($30.00/1M tokens) is 30.0x more expensive than Inkling 2 Small ($1.00/1M tokens).
In conclusion, GPT-5.6 Sol is more expensive than Inkling 2 Small.*
* Using a 3:1 ratio of input to output tokens
Context Window
Maximum input and output token capacity
GPT-5.6 Sol accepts 1,050,000 input tokens compared to Inkling 2 Small's 256,000 tokens. Only GPT-5.6 Sol specifies output context (128,000 tokens).
Input capabilities
Documented input modalities across available providers
Both GPT-5.6 Sol and Inkling 2 Small support multimodal inputs.
They are both capable of processing various types of data, offering versatility in application.
GPT-5.6 Sol
Inkling 2 Small
License
Usage and distribution terms
Both models are licensed under proprietary licenses.
Both models have usage restrictions defined by their respective organizations.
Proprietary
Closed source
Proprietary
Closed source
Release Timeline
When each model was launched
GPT-5.6 Sol was released on 2026-07-09, while Inkling 2 Small was released on 2026-11-05.
Inkling 2 Small is 4 months newer than GPT-5.6 Sol.
Jul 9, 2026
4 months ago
Nov 5, 2026
3 days ago
3mo newerKnowledge Cutoff
When training data ends
GPT-5.6 Sol has a documented knowledge cutoff of 2026-02-16, while Inkling 2 Small's cutoff date is not specified.
We can confirm GPT-5.6 Sol's training data extends to 2026-02-16, but cannot make a direct comparison without Inkling 2 Small's cutoff date.
Feb 2026
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Provider Availability
GPT-5.6 Sol is available from OpenAI. Inkling 2 Small is available from Thinking Machines Lab.
GPT-5.6 Sol
Inkling 2 Small
Outputs Comparison
Judge for yourself.
Run your own prompts against GPT-5.6 Sol and Inkling 2 Small side-by-side, then vote on the output you prefer.
FAQ
Common questions about GPT-5.6 Sol vs Inkling 2 Small.