GPT-4o Mini TTS
GPT-4o Mini TTS is worth evaluating for vision when its provider route and context window match the workload.
Use it for
- Teams evaluating vision
- Workloads that can use a 2k context window
- Buyers comparing 1 tracked provider route
Do not use it for
- Strict JSON or tool-calling flows
- Family
- OpenAI Text-to-Speech
- Released
- 2025-03-20
- Context
- 2k
- Architecture
- Decoder Only
- Knowledge cutoff
- 2024-09
- Specialization
- audio
- Openness
- Proprietary
- License
- ProprietaryCommercial use: conditional
- Weights
- Not released
- Code
- Unknown
- Training
- Fine-tuned
Cheapest of 1 route · OpenAI API
About
GPT-4o Mini TTS is OpenAI's instructable text-to-speech model built on GPT-4o mini, released March 20, 2025. Supports natural language instructions to control tone, style, pacing, and emotion (instructable TTS) — the model follows conversational prompts to adjust delivery rather than relying on static voice presets. OpenAI's recommended cost-efficient TTS for production. Input: text tokens + instructions at $0.60/1M tokens. Output: audio tokens at $12.00/1M tokens. Accepts up to 2,000 input tokens. API ID: gpt-4o-mini-tts.
GPT-4o Mini TTS is a proprietary model in the OpenAI Text-to-Speech family. The structured metadata tracks a 2k-token context window, multimodal input, and audio. This page tracks provider routes through OpenAI API. No headline benchmark score is tracked for GPT-4o Mini TTS yet.
Top use-case fit
Vision
Included by capability and metadata signals in the decision map.
Provider price ladder
Compare API pricing across 1 providers for input and output tokens, batch, and cached reads when available.
| Provider | Input / 1M | Output / 1M | Route |
|---|---|---|---|
| OpenAI API | $0.600 | - | ServerlessPartial |
Available via routers & gateways(15)
LiteLLM
GatewayOpen-source Python SDK and proxy server that unifies 100+ LLM APIs behind a single OpenAI-compatible interface, with load balancing, cost tracking, and configurable failover.
OpenRouter
HybridUnified hybrid gateway to 400+ models from 60+ providers via a single OpenAI-compatible API, with optional auto-routing that selects the best model per prompt.
Portkey
GatewayProduction AI gateway routing to 1,600+ LLMs with failover, load balancing, semantic caching, and guardrails; Apache 2.0 core is fully self-hostable with the complete feature set.
AIRouter
RouterCommercial LLM router that analyzes incoming requests and routes to the optimal model for cost/quality/latency via a drop-in OpenAI-compatible API, with a privacy-preserving embedding mode that avoids sending prompt content.
Helicone
GatewayObservability-first AI gateway with routing, caching, rate limiting, and request tracing; Apache 2.0 open-source core with a managed hosted tier for logging and analytics.
Kong AI Gateway
GatewayMulti-LLM AI gateway built on Kong Gateway 3.x, adding semantic routing, load balancing, guardrails, and MCP traffic analytics as plugins over Kong's existing API management platform.
Capabilities
Benchmark peer barsfor Vision
No task-mapped benchmark peers are available for this model yet.
Migration checks
No linked migration route is available for this model yet.
API versions
gpt-4o-mini-ttsgpt-4o-mini-tts-2025-03-20Frequently asked questions
What is the context window of GPT-4o Mini TTS?
GPT-4o Mini TTS has a context window of 2k tokens.
How much does GPT-4o Mini TTS cost?
GPT-4o Mini TTS is available at $0.60/1M input tokens through OpenAI API.
When was GPT-4o Mini TTS released?
GPT-4o Mini TTS was released on 2025-03-20.
Which providers offer GPT-4o Mini TTS?
GPT-4o Mini TTS is available from 1 provider: OpenAI API.
Cheapest of 1 route · OpenAI API