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Get started freeGPT-5.1 vs Claude 3 Opus
Compare GPT-5.1 and Claude 3 Opus. Build AI products powered by either model on Appaca.
Model Comparison
| Feature | GPT-5.1 | Claude 3 Opus |
|---|---|---|
| Provider | OpenAI | Anthropic |
| Model Type | text | text |
| Context Window | 400,000 tokens | 200,000 tokens |
| Input Cost | $1.25/ 1M tokens | $15.00/ 1M tokens |
| Output Cost | $10.00/ 1M tokens | $75.00/ 1M tokens |
Stop choosing. Use both.
With Appaca you don't have to pick — build apps that are powered by GPT-5.1, Claude 3 Opus, for your specific use case.
Build your first app freeStrengths & Best Use Cases
GPT-5.1
OpenAI1. 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.
Claude 3 Opus
Anthropic1. Intelligence & Reasoning
- Highest capability in the Claude 3 family
- Near-human comprehension and fluency
- Excels at MMLU, GPQA, GSM8K, advanced reasoning tasks
2. Complex Problem Solving
- Best for research, strategy, multi-step planning
- Handles ambiguous, open-ended tasks with ease
3. Vision & Multimodal Capabilities
- Strong chart/graph understanding
- Processes documents, technical diagrams, and dense visual data
4. Recall & Long-Context Reasoning
- Near-perfect recall (>99% on NIAH benchmark)
- Handles very large documents and multi-file workflows
5. Enterprise-Grade Accuracy
- Significantly reduced hallucinations
- High correctness rate for factual queries
Prompts to Get Started
Use these prompts to power AI products you build on Appaca. Each works great with the models above.
Best for GPT-5.1
textCold Outreach Email Sequence
Write a 4-email cold outreach sequence with follow-up cadence.
SWOT Analysis
Perform a structured SWOT analysis for a business or strategic initiative.
SEO Title Tag Variants
Generate optimised title tag options for a webpage targeting a specific keyword.
Best for Claude 3 Opus
textPair Programming Session Guide
Write a guide for running effective pair programming sessions.
Order Confirmation Email
Write a clear, brand-consistent order confirmation email that reassures customers and sets delivery expectations.
Travel Photo Essay Introduction
Write a travel photo essay introduction for a blog or portfolio. Sets the narrative context for a series of travel photographs.