GPT-5.6 Sol vs GPT-5.4
Compare pricing, context windows, and strengths for GPT-5.6 Sol by OpenAI and GPT-5.4 by OpenAI - and see how to put either to work in Appaca.
GPT-5.6 Sol
OpenAI's flagship model for complex professional work, combining frontier reasoning, coding, computer use, and long-horizon agentic performance with greater token efficiency.
View GPT-5.6 SolGPT-5.4
OpenAI's frontier model for complex professional work with best intelligence at scale for agentic, coding, and professional workflows.
View GPT-5.4GPT-5.6 Sol vs GPT-5.4 at a glance
Specs and pricing side by side, from the Appaca AI models directory.
| Spec | GPT-5.6 Sol | GPT-5.4 |
|---|---|---|
| Provider | OpenAI | OpenAI |
| Model type | Text | Text |
| Context window | 1.05M tokens | 1.05M tokens |
| Input price | $5 / 1M tokens | $2.5 / 1M tokens |
| Output price | $30 / 1M tokens | $15 / 1M tokens |
| Status | Current | Current |
How GPT-5.6 Sol and GPT-5.4 differ
What the numbers mean in practice when choosing between GPT-5.6 Sol and GPT-5.4.
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GPT-5.4 is 50% cheaper on input tokens ($2.5 vs $5 per million), which adds up quickly in document-heavy workloads.
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GPT-5.4 is 50% cheaper on output tokens ($15 vs $30 per million) - the bigger factor for tools that generate long documents.
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Both models offer the same 1.05M tokens context window.
Strengths side by side
Where each model shines, according to benchmarks and provider positioning.
GPT-5.6 Sol
1. Frontier Coding & Agentic Performance
- Scores 88.8% on Terminal-Bench 2.1 and 72.7% on DeepSWE v1.1, with stronger performance across complex terminal workflows and long-horizon engineering.
- Programmatic Tool Calling can coordinate tools, process intermediate results, and adapt workflows with fewer model round trips.
2. Maximum Capability on Demand
- Adds max reasoning effort for difficult tasks that benefit from deeper exploration, checking, and revision.
- Multi-agent ultra coordinates parallel agents for demanding work, reaching 91.9% on Terminal-Bench 2.1 and 92.2% on BrowseComp in OpenAI's evaluations.
3. Strong Computer Use, Design & Knowledge Work
- Scores 62.6% on OSWorld 2.0 and 90.4% on BrowseComp in standard mode.
- Produces more polished interfaces, presentations, documents, and spreadsheets while following reference formats more accurately.
4. Long Context & Broad Tool Support
- Supports a 1.05M-token context window, up to 128K output tokens, and text plus image input.
- Works with web search, file search, image generation, code interpreter, hosted shell, computer use, MCP, and other Responses API tools.
5. Stronger Science, Cybersecurity & Safeguards
- Improves scientific and defensive cybersecurity performance, including 28.7% on GeneBench Pro and 73.5% on ExploitBench.
- Uses layered safeguards, real-time checks, monitoring, and access controls for higher-risk capabilities.
GPT-5.4
1. Best Intelligence at Scale
- OpenAI positions GPT-5.4 as its frontier model for agentic, coding, and professional workflows.
- Built for complex professional work where stronger reasoning and higher answer quality matter.
2. Configurable Reasoning + Multimodal Input
- Supports configurable reasoning effort from none to xhigh, letting teams balance speed and depth.
- Accepts both text and image inputs while producing text output.
3. Massive Context for Long-Running Work
- 1.05M token context window supports very large codebases, documents, and multi-step workflows.
- Allows up to 128 k output tokens for long-form answers and larger generations.
4. Updated Knowledge & Broad Tool Support
- Knowledge cut-off of Aug 31 2025 keeps it current for newer frameworks and business context.
- Supports tools like web search, file search, code interpreter, hosted shell, computer use, and MCP in the Responses API.
Use GPT-5.6 Sol or GPT-5.4 - or both
Appaca is the AI workspace for operators. Build internal tools and AI co-workers powered by GPT-5.6 Sol or GPT-5.4 - connected to your real data and ready for your whole team. No code, no deployment.
Describe it, and it's built
Tell the Appaca agent the internal tool you need and it builds a working app powered by GPT-5.6 Sol or GPT-5.4. No code, no API keys, no deployment.
Switch models without rebuilding
Start on GPT-5.6 Sol, test the same tool on GPT-5.4, and keep whichever performs better - the rest of your app stays exactly as it is.
Automated for the whole team
Schedule tools to run on autopilot - daily digests, weekly reports, real-time triggers - and share them with your whole team from one workspace.
Describe it, and it's built
Tell the Appaca agent what your team needs and it builds a working app powered by GPT-5.6 Sol or GPT-5.4 - connected to the tools you already use.
Related comparisons
See how GPT-5.6 Sol and GPT-5.4 stack up against other models in the directory.
FAQs
GPT-5.4 is generally cheaper: $2.5 input / $15 output per million tokens, versus $5 / $30 for GPT-5.6 Sol. Actual cost depends on how many tokens your workload reads and writes.
They are equal: both GPT-5.6 Sol and GPT-5.4 support a 1.05M tokens context window.
It depends on the job. Compare the pricing, context window, and strengths above against your workload - and remember the choice isn't permanent. In Appaca you can build a tool on GPT-5.6 Sol, test the same tool on GPT-5.4, and switch at any time without rebuilding anything.
Yes. Appaca is a no-code AI workspace: describe the internal tool your team needs and the Appaca agent builds it as a working app powered by GPT-5.6 Sol, GPT-5.4, or any other model in the directory - with a built-in database, team access, and integrations. No API keys to wire up and nothing to deploy.
Build AI tools with GPT-5.6 Sol or GPT-5.4
Describe the tool your team needs and get a working app powered by the model you choose - with a built-in database, team access, and integrations. No code, no deployment.