GPT-5.1 Instant vs Qwen3.8-Flash-Next
Qwen3.8-Flash-Next significantly outperforms across most benchmarks.
OpenAI · Alibaba Cloud / Qwen Team · Updated for 2026
Which is better?
GPT-5.1 Instant outperforms in 0 benchmarks, while Qwen3.8-Flash-Next is better at 1 benchmark (GPQA). Qwen3.8-Flash-Next significantly outperforms across most benchmarks.
Based on current benchmark, pricing, and model metadata for 2026.
Choose GPT-5.1 Instant
- you want predictable pricing at $1.25/M input and $10.00/M output
Choose Qwen3.8-Flash-Next
- you want the strongest raw capability — it leads on 1 of 1 shared benchmarks
- 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-5.1 Instant outperforms in 0 benchmarks, while Qwen3.8-Flash-Next is better at 1 benchmark (GPQA).
Qwen3.8-Flash-Next significantly outperforms across most benchmarks.
Arena Performance
Playground indexes and blind preference scores
Context Window
Maximum input and output token capacity
Only GPT-5.1 Instant specifies input context (400,000 tokens). Only GPT-5.1 Instant specifies output context (128,000 tokens).
Input Capabilities
Supported data types and modalities
Both GPT-5.1 Instant and Qwen3.8-Flash-Next support multimodal inputs.
They are both capable of processing various types of data, offering versatility in application.
GPT-5.1 Instant
Qwen3.8-Flash-Next
License
Usage and distribution terms
GPT-5.1 Instant is licensed under a proprietary license, while Qwen3.8-Flash-Next uses Qwen Community License 1.0.
License differences may affect how you can use these models in commercial or open-source projects.
Proprietary
Closed source
Qwen Community License 1.0
Open weights
Release Timeline
When each model was launched
GPT-5.1 Instant was released on 2025-11-12, while Qwen3.8-Flash-Next was released on 2026-08-26.
Qwen3.8-Flash-Next is 10 months newer than GPT-5.1 Instant.
Nov 12, 2025
9 months ago
Aug 26, 2026
0 days ago
9mo newerKnowledge Cutoff
When training data ends
Neither model specifies a knowledge cutoff date.
Unable to compare the recency of their training data.
Outputs Comparison
Judge for yourself.
Run your own prompts against GPT-5.1 Instant and Qwen3.8-Flash-Next side-by-side, then vote on the output you prefer.
FAQ
Common questions about GPT-5.1 Instant vs Qwen3.8-Flash-Next.