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LLM ComparisonGPT-OSS 120BClaude 4.5 Sonnet

GPT-OSS 120B vs Claude 4.5 Sonnet

Compare GPT-OSS 120B and Claude 4.5 Sonnet. Build AI products powered by either model on Appaca.

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Model Comparison

FeatureGPT-OSS 120BClaude 4.5 Sonnet
ProviderOpenAIAnthropic
Model Typetexttext
Context Window131,072 tokens1,000,000 tokens
Input Cost
$0.00/ 1M tokens
$3.00/ 1M tokens
Output Cost
$0.00/ 1M tokens
$15.00/ 1M tokens
Build with it
Build with GPT-OSS 120BBuild with Claude 4.5 Sonnet

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Power your AI product with GPT-OSS 120B, Claude 4.5 Sonnet, or any supported model. Switch anytime.

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Strengths & Best Use Cases

GPT-OSS 120B

OpenAI

1. Most powerful open-weight model

  • 117B parameters (5.1B active) while fitting on a single H100 GPU.
  • High reasoning quality compared to other open models.

2. Apache 2.0 license

  • Fully permissive, no copyleft or patent restrictions.
  • Safe for commercial products, research, and redistribution.

3. Configurable reasoning effort

  • Supports adjustable reasoning: low, medium, high.
  • Lets developers balance latency vs. depth.

4. Full chain-of-thought access

  • Unlike closed commercial models, this exposes complete reasoning traces.
  • Useful for debugging, auditing, safety research, and transparency.

5. Fine-tunable

  • Fully supports parameter fine-tuning.
  • Can be adapted to domain-specific workflows and proprietary datasets.

6. Agentic capabilities

  • Built-in function calling.
  • Native support for web browsing, Python execution, and structured outputs.
  • Ideal for open-source agents, full-stack automation, and developer tooling.

7. Tooling ecosystem support

  • Compatible with Chat Completions, Responses API, Assistants, Realtime, Batch, and Fine-tuning endpoints.
  • Supports Image Generation, Code Interpreter (via Python runtime), and more.

8. Open-source availability

  • Downloadable on HuggingFace for local or on-prem deployment.
  • Supports full offline, private, or self-hosted usage.

9. Streaming + function calling support

  • Real-time interactions.
  • Strong for interactive agents, coding assistants, and UI-driven workflows.
Build with GPT-OSS 120B

Claude 4.5 Sonnet

Anthropic

1. Best-in-class coding performance

  • #1 on SWE-bench Verified (77.2% standard, 82.0% high-compute).
  • Excels at debugging, architecture, and multi-file code generation.
  • Maintains coherence for extremely long tasks (30+ hours).

2. State-of-the-art computer use & agents

  • Leads OSWorld at 61.4%.
  • Strongest model for agentic workflows, multi-step tool use, and real computer control.
  • Powering Claude Code, the new Claude Agent SDK, and Chrome agent actions.

3. Advanced reasoning & math

  • Large improvements across reasoning-heavy benchmarks (AIME, MMMLU, τ2-bench, Terminal-Bench).
  • Deep multi-step reasoning with extended or interleaved thinking.

4. High alignment & safety

  • Most aligned Claude model to date with reduced deception, hallucinations, sycophancy, and harmful compliance.
  • Strong protections against prompt injection for agentic tasks (ASL-3 safeguards).

5. Domain-expert performance

  • Notable gains in finance, law, medicine, and STEM tasks.
  • Trusted by early customers for long-context legal analysis, multi-file engineering, security research, and red-teaming.
Build with Claude 4.5 Sonnet

Prompts to Get Started

Use these prompts to power AI products you build on Appaca. Each works great with the models above.

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All you need to launch and sell your AI products with the right AI model

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“I've built with various AI tools and have found Appaca to be the most efficient and user-friendly solution.”

Chey

Cheyanne Carter

Founder & CEO, Edubuddy

Frequently Asked Questions

We are here to help!

What is Appaca?
Appaca is a no-code platform for creating end-user AI agents and tools that you can monetize. It allows you to deliver AI solutions to your customers faster without requiring developer help.
What are AI Credits?
AI credits are the currency to bill AI usage. Appaca uses that AI credit for the usage of different large language models (LLMs). You can use any LLM from different providers. For the cost of AI credit for different AI models, please see our pricing page.
Can I make money with the app I built on Appaca?
Yes, you can monetize your AI app easily. All you need to do is to enable monetization in your app with one click. You will be prompted to set up Stripe account easily. Once you have enabled your monetization, you can create subscription plans for your app. For the usage of AI, our AI credit system allows you to bill your customers. You can simply set how much credit you want to charge for your customers. It all comes out of the box.
Can I get more credits?
Absolutely. You can top up AI credits as much as you want if your credits are low.
Can I connect my custom domain to my app?
Yes, you can use your own custom domain name as long as you are on any paid plan.
Are there integrations?
Yes. You can integrate with other third-party tools via API or Webhook in your action workflows builder. We are frequently shipping native integration as well.
Which model should I use for my AI product: GPT-OSS 120B or Claude 4.5 Sonnet?
It depends on your use case. GPT-OSS 120B excels at certain tasks while Claude 4.5 Sonnet has its own strengths. With Appaca, you can build AI tools powered by either model and switch between them anytime - no code changes needed.
Do I need to manage API keys for these models?
No! Appaca handles all API integrations behind the scenes. You focus on building your AI product - we take care of the infrastructure and model connections.
Can I build AI products that use multiple models?
Yes! Appaca supports multi-model AI products. Build tools that leverage the best model for each task - use one model for text generation and another for images, all in the same product.
How does pricing work for AI products on Appaca?
Appaca offers pay-per-use pricing. You only pay for the AI usage your products consume. No need for separate subscriptions to each model provider. Start free and scale as your products grow.
Can I change the model powering my AI product later?
Absolutely! One of the biggest advantages of building on Appaca is the flexibility to switch between GPT-OSS 120B, Claude 4.5 Sonnet, or any other supported model with just a few clicks - without rebuilding your product.

Build AI products powered by GPT-OSS 120B or Claude 4.5 Sonnet

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