Is GPT-5 Codex or TTS 1 cheaper?
TTS 1 is cheaper ($0.15 / 10k chars per 10k chars) vs GPT-5 Codex ($1.25 / 1M tokens input / $10 / 1M tokens output). Actual cost depends on your input/output token mix — estimate it with the pricing calculator.
Model comparison
GPT-5 Codex vs TTS 1
Compare GPT-5 Codex (OpenAI) and TTS 1 (OpenAI) by price, context, capabilities, and latency.
Which should you pick?
- Price: TTS 1 is cheaper ($0.15 / 10k chars per 10k chars) vs GPT-5 Codex ($1.25 / 1M tokens input / $10 / 1M tokens output).
- Context: GPT-5 Codex has the larger context window (400k tokens).
- GPT-5 Codex adds: Streaming.
Side by side
GPT-5 Codex vs TTS 1 — full comparison
Compare price, provider, context, capabilities, latency, and source basis.
| Model | Provider | Input | Output | Context | Capabilities | Best for | Latency | Status | Source |
|---|---|---|---|---|---|---|---|---|---|
| GPT-5 Codexopenai/gpt-5-codex | OpenAI | $1.25 / 1M tokens | $10 / 1M tokens | 400k | Streaming | General chat via OpenAI, API workloads | 1780-3306ms | Catalog | Platform curated |
| TTS 1openai/tts-1 | OpenAI | $0.15 / 10k chars | — | — | General chat via OpenAI, API workloads | 0-0ms | Catalog | Platform curated |
FAQ
GPT-5 Codex vs TTS 1 FAQ
Which has a larger context window, GPT-5 Codex or TTS 1?
GPT-5 Codex is larger (400k tokens) vs — tokens.
GPT-5 Codex vs TTS 1 for High quality: which should I pick?
Both target High quality. Pick TTS 1 to optimize cost, or GPT-5 Codex for the longer context window. Test both on real prompts before committing production traffic.