Last refreshed 2026-05-11. Next refresh: weekly.
Why use GPT-5.4 on OpenRouter?
OpenRouter offers GPT-5.4 with pay-as-you-go pricing at $2.50/1M input tokens. OpenRouter is a multi-provider LLM aggregator offering unified API access to 300+ models from all major labs and emerging providers, with automatic failover for reliability.
Compare GPT-5.4 across 3 providers to find the best fit for your use caseSetup recipe
Docs fallbackUse the provider REST API or SDKCreate a provider API keymodel: openai/gpt-5.4openai/gpt-5.4Request example
openai/gpt-5.4.Gotchas
- Use provider model ID "openai/gpt-5.4", not the LLMReference slug "gpt-5.4".
Compare GPT-5.4 Across Providers
| Provider | Input (per 1M) | Output (per 1M) |
|---|---|---|
| OpenAI API | $2.50 | $15.00 |
| OpenRouter | $2.50 | $15.00 |
| Vercel AI Gateway | $2.50 | $15.00 |
Pricing
| Type | Price (per 1M) |
|---|---|
| Input tokens | $2.50 |
| Output tokens | $15.00 |
Capabilities
About GPT-5.4
GPT-5.4 is OpenAI's flagship frontier reasoning model, released March 5, 2026. It incorporates advances from GPT-5.3-Codex for coding and agentic workflows, and adds 'Thinking' mode with editable reasoning plans. Key capabilities include computer use (navigating interfaces via Playwright), image understanding and generation integration, full-stack web app generation, tool calling, and deep research. Knowledge cutoff is August 31, 2025. Model ID: gpt-5.4.
FAQ
What does GPT-5.4 cost on OpenRouter?
On OpenRouter, GPT-5.4 costs $2.5 per 1M input tokens and $15 per 1M output tokens.
What is the context window for GPT-5.4 on OpenRouter?
GPT-5.4 supports a 1.05m token context window on OpenRouter.
How does OpenRouter compare to other GPT-5.4 providers?
GPT-5.4 is available from 3 providers. The cheapest input pricing is $2.50/1M tokens from OpenAI API.
What API model ID do I use for GPT-5.4 on OpenRouter?
Use the model ID openai/gpt-5.4 when calling OpenRouter's API.
Who created GPT-5.4?
GPT-5.4 was created by OpenAI as part of the GPT-5.4 model family.
Is GPT-5.4 open source?
GPT-5.4 is not open source; the seed data lists it as proprietary.