GPT-5.6 Terra vs Qwen3.8-27B
GPT-5.6 Terra significantly outperforms across most benchmarks.
OpenAI · Alibaba Cloud / Qwen Team · Updated for 2026
Which is better?
GPT-5.6 Terra outperforms in 5 benchmarks (Agents' Last Exam, DeepSWE 1.1, GPQA, SWE-Bench Pro, Terminal-Bench 2.1), while Qwen3.8-27B is better at 0 benchmarks. GPT-5.6 Terra significantly outperforms across most benchmarks.
Based on current benchmark, pricing, and model metadata for 2026.
Choose GPT-5.6 Terra
- you want the strongest raw capability — it leads on 5 of 5 shared benchmarks
Choose Qwen3.8-27B
- you want the most recent training data — it shipped Aug 2026
- you need open weights you can self-host or fine-tune
At a glance
The differences that matter most.
Performance Benchmarks
Comparative analysis across standard metrics
GPT-5.6 Terra outperforms in 5 benchmarks (Agents' Last Exam, DeepSWE 1.1, GPQA, SWE-Bench Pro, Terminal-Bench 2.1), while Qwen3.8-27B is better at 0 benchmarks.
GPT-5.6 Terra significantly outperforms across most benchmarks.
Arena Performance
Playground indexes and blind preference scores
Context Window
Maximum input and output token capacity
Only GPT-5.6 Terra specifies input context (1,050,000 tokens). Only GPT-5.6 Terra specifies output context (128,000 tokens).
Input Capabilities
Supported data types and modalities
Both GPT-5.6 Terra and Qwen3.8-27B support multimodal inputs.
They are both capable of processing various types of data, offering versatility in application.
GPT-5.6 Terra
Qwen3.8-27B
License
Usage and distribution terms
GPT-5.6 Terra is licensed under a proprietary license, while Qwen3.8-27B 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
GPT-5.6 Terra was released on 2026-07-09, while Qwen3.8-27B was released on 2026-08-14.
Qwen3.8-27B is 1 month newer than GPT-5.6 Terra.
Jul 9, 2026
1 months ago
Aug 14, 2026
1 weeks ago
1mo newerKnowledge Cutoff
When training data ends
GPT-5.6 Terra has a documented knowledge cutoff of 2026-02-16, while Qwen3.8-27B's cutoff date is not specified.
We can confirm GPT-5.6 Terra's training data extends to 2026-02-16, but cannot make a direct comparison without Qwen3.8-27B's cutoff date.
Feb 2026
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Outputs Comparison
Judge for yourself.
Run your own prompts against GPT-5.6 Terra and Qwen3.8-27B side-by-side, then vote on the output you prefer.
FAQ
Common questions about GPT-5.6 Terra vs Qwen3.8-27B.