GPT-OSS 120B
OpenAI's most powerful open-weight model (117B params, 5.1B active), fitting on a single H100 GPU - fully customizable, licensed for unrestricted commercial use.
GPT-OSS 120B at a glance
Context window
131.1K tokens
Input price
Free
open weight
Output price
Free
open weight
Why use GPT-OSS 120B
Strengths, benchmarks, and where GPT-OSS 120B fits in your team's workflow.
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.
Power your team with GPT-OSS 120B
Appaca is the AI workspace for operators. Build internal tools and AI co-workers powered by GPT-OSS 120B - connected to your real data and ready for your whole team. No code, no deployment.
Build internal AI tools
Describe what you need and the Appaca agent builds it - lead scorers, report generators, email drafters - with GPT-OSS 120B as the engine. No code, no deployment.
Give GPT-OSS 120B your real data
Connect the tools your team already uses - Slack, Notion, Google Sheets, Airtable, and more - so GPT-OSS 120B works with real context, not generic answers.
Automate recurring tasks
Schedule GPT-OSS 120B to run on autopilot - daily digests, weekly summaries, or real-time triggers - all managed inside your Appaca workspace.
Describe it, and it's built
Tell the Appaca agent what your team needs and it builds a working app powered by GPT-OSS 120B - connected to the tools you already use.
Where teams use GPT-OSS 120B
See how teams put GPT-OSS 120B to work inside Appaca - internal tools and AI agents that work around you.
Sales
Score leads, draft follow-ups, and summarise deals with GPT-OSS 120B doing the heavy lifting.
Explore Appaca for SalesMarketing
Draft, repurpose, and report on campaigns in your brand voice - powered by GPT-OSS 120B.
Explore Appaca for MarketingOperations
Automate reporting, vendor tracking, and process docs with AI built around your workflow.
Explore Appaca for OperationsMore OpenAI models
Compare other OpenAI models in the Appaca AI models directory - specs, pricing, and use cases for each.
GPT-5.5
OpenAI's smartest and most capable model yet for agentic coding, knowledge work, and computer use, delivering a new class of intelligence at GPT-5.4 latency.
View modelGPT-5.4
OpenAI's frontier model for complex professional work with best intelligence at scale for agentic, coding, and professional workflows.
View modelGPT-5.2
Previous frontier model for complex professional work with configurable reasoning effort.
View modelCompare GPT-OSS 120B with other models
See how GPT-OSS 120B stacks up against other text models - pricing, context windows, and strengths side by side.
Build internal AI tools with GPT-OSS 120B
Describe the tool your team needs and get a working app powered by GPT-OSS 120B - with a built-in database, team access, and integrations. No code, no deployment.