GPT-5.4 vs GPT-4o Audio
Compare pricing, context windows, and strengths for GPT-5.4 by OpenAI and GPT-4o Audio by OpenAI - and see how to put either to work in Appaca.
GPT-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-4o Audio
Preview multimodal model that accepts and outputs audio, optimized for natural voice interactions and real-time conversational experiences.
View GPT-4o AudioGPT-5.4 vs GPT-4o Audio at a glance
Specs and pricing side by side, from the Appaca AI models directory.
| Spec | GPT-5.4 | GPT-4o Audio |
|---|---|---|
| Provider | OpenAI | OpenAI |
| Model type | Text | Audio |
| Context window | 1.05M tokens | 128K tokens |
| Input price | $2.5 / 1M tokens | $2.5 / 1M tokens |
| Output price | $15 / 1M tokens | $10 / 1M tokens |
| Audio input price | - | $40 / 1M tokens |
| Audio output price | - | $80 / 1M tokens |
| Status | Current | Current |
How GPT-5.4 and GPT-4o Audio differ
What the numbers mean in practice when choosing between GPT-5.4 and GPT-4o Audio.
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Both models cost the same on input: $2.5 per million tokens.
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GPT-4o Audio is 33% cheaper on output tokens ($10 vs $15 per million) - the bigger factor for tools that generate long documents.
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GPT-5.4's 1.05M tokens context window is roughly 8.2x larger than GPT-4o Audio's 128K tokens, so it can work across bigger codebases, contracts, or archives in one pass.
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These are different kinds of model: GPT-5.4 is a text model while GPT-4o Audio is an audio model, so they often complement each other in a workflow rather than compete.
Strengths side by side
Where each model shines, according to benchmarks and provider positioning.
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.
GPT-4o Audio
1. True multimodal audio model
- Accepts raw audio as input and produces audio or text as output.
- Enables hands-free, voice-first app experiences.
2. Natural real-time speech interaction
- Low-latency audio generation suitable for conversational agents.
- Great for voice assistants, phone bots, and interactive voice UI.
3. Large 128K context window
- Supports long conversations, call transcripts, instructions, or multi-part interactions.
- Ideal for building persistent voice agents or phone workflows.
4. High-output capacity
- Up to 16,384 max output tokens for extended responses or long explanations.
- Suitable for complex reasoning tasks in voice format.
5. Hybrid text + audio workloads
- Combine audio input/output with text prompts, instructions, or structured control.
- Useful for customer support bots, spoken form systems, IVR replacements, etc.
6. Compatible with the latest APIs
- Works with Chat Completions, Responses API, Realtime API, and Assistants.
- Supports streaming, function calling, and advanced developer tooling.
7. Strong performance for a preview model
- High reasoning and expression abilities relative to most audio-capable models.
- Designed for production-style experimentation prior to full release.
8. Ideal for next-gen voice applications
- Build lifelike AI agents, interview bots, tutoring systems, and spoken knowledge tools.
- Perfect for startups building audio-first user experiences.
Use GPT-5.4 or GPT-4o Audio - or both
Appaca is the AI workspace for operators. Build internal tools and AI co-workers powered by GPT-5.4 or GPT-4o Audio - 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-5.4 or GPT-4o Audio. No code, no API keys, no deployment.
Switch models without rebuilding
Start on GPT-5.4, test the same tool on GPT-4o Audio, 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-5.4 or GPT-4o Audio - connected to the tools you already use.
Related comparisons
See how GPT-5.4 and GPT-4o Audio stack up against other models in the directory.
FAQs
GPT-4o Audio is generally cheaper: $2.5 input / $10 output per million tokens, versus $2.5 / $15 for GPT-5.4. Actual cost depends on how many tokens your workload reads and writes.
GPT-5.4 has the larger context window at 1.05M tokens, compared to 128K tokens for GPT-4o Audio. A larger window means the model can consider more text at once - useful for long contracts, codebases, or months of records.
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-5.4, test the same tool on GPT-4o Audio, 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-5.4, GPT-4o Audio, 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-5.4 or GPT-4o Audio
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.