Plain-English Summary
An older GPT-5 series model, cheap and fast, kept around for compatibility.
GPT-5.4
An older GPT-5 series model, cheap and fast, kept around for compatibility.
Maker
OpenAI
Text LLM
Legacy
Open weights: No
Technical Notes
LLM Stats 45.3, ~321 chars/s (one of the fastest in its class), 1.0M context.
Best For
Cost-sensitive bulk jobs
Watch Out For
Behind the frontier on reasoning benchmarks
Model Specs
- Maker
- OpenAI
- Country
- USA
- Family
- Not listed
- Type
- Text LLM
- Release date
- 2026-03 (approx.)
- Date confidence
- Approximate
- Status
- Legacy
- Context window
- 1.0M tokens
- Max output
- Not listed
- Parameters
- Not disclosed
- Active parameters
- Not disclosed
- Architecture
- Not listed
- Reasoning
- Not listed
- Tool calling
- Not listed
- Structured output
- Not listed
- API available
- Not listed
- Open weights
- No
- Self-hostable
- Not listed
- License
- Not listed
- Inputs
- Text, images
- Outputs
- Text
- Approx. price
- ~$3.89 blended
- How to access
- OpenAI API
- Model / API ID
- Not listed
- Knowledge cutoff
- Not disclosed
- Fine-tuning
- Not listed
- Completeness
- Not listed
- Verified
- Not listed
- Snapshot date