GPT-5.6 Sol vs SWE-2
GPT-5.6 Sol and SWE-2 are closely matched at 52.7 and 47.9 on the LLM Stats Score.
OpenAI · Cognition · Updated for 2026
Which is better?
GPT-5.6 Sol and SWE-2 are closely matched on the overall LLM Stats Score at 52.7 and 47.9.
In the 4 individual benchmarks reported for both models, SWE-2 wins 3; this is a narrower head-to-head signal than the composite indexes.
Based on current LLM Stats indexes, shared benchmarks, pricing, and model metadata for 2026.
Choose GPT-5.6 Sol
- you want predictable pricing at $5.00/M input and $30.00/M output
Choose SWE-2
- you value its reported benchmark strengths — it wins 3 of 4 exact shared results
- you want the most recent training data — it shipped Sep 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 · 4 for SWE-2
GPT-5.6 Sol outperforms in 1 benchmarks (Terminal-Bench 4.0), while SWE-2 is better at 2 benchmarks (FrontierCode 1.1, Terminal-Bench 2.1).
SWE-2 has a slight edge in benchmark performance.
Human preference
Blind head-to-head votes and playground preference scores
Context Window
Maximum input and output token capacity
Only GPT-5.6 Sol specifies input context (1,050,000 tokens). Only GPT-5.6 Sol specifies output context (128,000 tokens).
Input capabilities
Documented input modalities across available providers
GPT-5.6 Sol supports multimodal inputs, whereas SWE-2 does not.
GPT-5.6 Sol can handle both text and other forms of data like images, making it suitable for multimodal applications.
GPT-5.6 Sol
SWE-2
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 SWE-2 was released on 2026-09-10.
SWE-2 is 2 months newer than GPT-5.6 Sol.
Jul 9, 2026
3 months ago
Sep 10, 2026
1 months ago
2mo newerKnowledge Cutoff
When training data ends
GPT-5.6 Sol has a documented knowledge cutoff of 2026-02-16, while SWE-2'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 SWE-2's cutoff date.
Feb 2026
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Outputs Comparison
Judge for yourself.
Run your own prompts against GPT-5.6 Sol and SWE-2 side-by-side, then vote on the output you prefer.
FAQ
Common questions about GPT-5.6 Sol vs SWE-2.