LLM ComparisonGPT-5.1Qwen3-Plus

GPT-5.1 vs Qwen3-Plus

Compare GPT-5.1 and Qwen3-Plus. Build AI products powered by either model on Appaca.

Model Comparison

FeatureGPT-5.1Qwen3-Plus
ProviderOpenAIAlibaba Cloud
Model Typetexttext
Context Window400,000 tokens1,000,000 tokens
Input Cost
$1.25/ 1M tokens
$0.12/ 1M tokens
Output Cost
$10.00/ 1M tokens
$0.29/ 1M tokens

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Strengths & Best Use Cases

GPT-5.1

OpenAI

1. Configurable Reasoning for Agentic Tasks

  • Built to excel in autonomous or semi-autonomous coding workflows, with adjustable reasoning effort for planning, refactoring and debugging.

2. Fast Multi-Modal Input with Large Output

  • Accepts both text and image inputs while producing text outputs.
  • Offers up to 128 k output tokens, allowing long responses and code generation across multiple files.

3. Large Context & Knowledge Cut-Off

  • 400 k token context window supports processing large codebases or documents.
  • Knowledge cut-off of Sep 30 2024 ensures familiarity with recent tools and frameworks.

4. Reasoning Token Support

  • Provides explicit support for reasoning tokens, enabling developers to fine-tune the balance between reasoning depth and speed.

Qwen3-Plus

Alibaba Cloud

1. Major upgrade over previous Plus models

  • Better reasoning, code generation, and tool-call performance.

2. Supports thinking vs non-thinking modes

  • Thinking for hard problems.
  • Non-thinking for speed.

3. Improved human preference alignment

  • Better writing quality, multi-turn memory, and formatting stability.

4. Excellent for agent-style apps

  • Accurate function calling and tool use.

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