SylphxModels

OpenAI

GPT Nano family · v4.1

GPT-4.1 nano

Retiring in 17d
openai/gpt-4.1-nano

GPT-4.1 nano on Sylphx Models · 1.05M of context. One Responses contract, with list prices published per million tokens.

Released
Apr 14, 2025 · 528 days old
Retires
Oct 11, 2026 · 17 days left
Provider
OpenAI
Context
1,047,576 tokens
Open in the playgroundSee a request sampleRead the docs
Input $0.11 / MOutput $0.44 / MCached input $0.0275 / MFull rate sheet
Context window1,047,576tokens per request
Max output32,768tokens per response
Input$0.11 / Mper million tokens
Output$0.44 / Mper million tokens
Cached input$0.0275 / M75% off input
ReleasedApr 14, 2025528 days old

Pricing

USD per million tokens
Input
$0.11
Output
$0.44
Cached input
$0.0275

$0.19 for 750,000 input and 250,000 output tokens.

Assumption: one batch of 750,000 input plus 250,000 output tokens at the published list prices — recompute for your own mix. Blended $0.1925 per million at a 3:1 mix.

Chat replies · 3:1 input:output
$0.1925 / M
Long documents · 9:1 input:output
$0.143 / M
Heavy output · 1:1 input:output
$0.275 / M
Cache write
Not published
Currency and unit
USD / million tokens

Cached input reads cost 75% less than fresh input tokens.

Full rate sheet and billing rules.

Specification

Context window
1,047,576 tokens
Max output
32,768 tokens
Input modalities
Not published
Output modalities
Not published
Family
GPT Nano
Version
v4.1
Provider
OpenAI
Released
Apr 14, 2025 · 528 days old
Model id
openai/gpt-4.1-nano

Data posture

Standard

By default, prompts and outputs sent to this model are not used to train models.

Training on what you send · default
No
Zero Data Retention · default
Yes
curl https://api.sylphx.ai/v1/responses \
  -H "Authorization: Bearer $SYLPHX_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "openai/gpt-4.1-nano",
    "input": "Summarise this incident report in three bullets.",
    "stream": false
  }'

How to call it

Send the official Responses document to the base URL above with your organization key and this exact model id. Streaming arrives as ordered events with one terminal event.

  • Retries: send an Idempotency-Key and a retry replays the original response instead of billing twice.
  • Errors: typed envelopes tell you whether to retry, wait, or fix the request.
  • Keys: mint and revoke organization keys from the console.
QuickstartResponses APIErrors and retries

Related models

Derived from this catalog: same provider first, then the same family, then the nearest neighbours by input price and context window.

More from OpenAI

Same provider

Elsewhere in GPT Nano

Same family slug

Similar price and context

Nearest by input price and context window

Independent evaluation

We do not publish benchmark scores for this model — we have not verified any. These external leaderboards run their own tests, so check them against your own workload.

Not our numbers
Every OpenAI model →