OpenAI's efficient mid-tier model. 2x faster than its predecessor, 400k context, approaches GPT-5.4 quality on SWE-Bench Pro at a fraction of the cost.
Gefactureerd worden de werkelijk gebruikte tokens; het ongebruikte deel van de reservering wordt terugbetaald.
Nieuw hier?
10 gratis credits (US$Â 0,10) wanneer je je aanmeldt met Google
Bruikbaar 24 uur na aanmelding, tot 5 uitvoeringen per dag en maximaal 2 credits per uitvoering. Andere aanmeldmethoden starten zonder credits. Voldoende voor 17 uitvoeringen van dit model.
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Over GPT-5.4 Mini
SamengevatPer 23 september 2026
GPT-5.4 Mini is een model van OpenAI in de categorie Multimodaal. Op Railwail kost GPT-5.4 Mini US$Â 0,90 per 1M invoertokens en US$Â 5,40 per 1M uitvoertokens. Het contextvenster bevat 400.000 tokens, en een antwoord kan tot 128.000 tokens lang zijn.
Released March 17, 2026, GPT-5.4 mini brings the strengths of GPT-5.4 to a smaller, faster model designed for the subagent era. 400K context, vision input, integrated tool use, and 2x faster latency than GPT-5 mini. Significant gains on coding, reasoning, multimodal understanding and tool use; approaches the full GPT-5.4 on SWE-Bench Pro and OSWorld-Verified. Recommended for subagent workflows, customer-facing chat, coding assistants and high-volume API workloads.
Achtergrond
Over OpenAI
Opgericht 2015 · San Francisco, USA
OpenAI was founded in December 2015 as a non-profit AI research organisation and transitioned to a capped-profit structure in 2019. The GPT lineage spans GPT-1 (2018) through GPT-5 (mid-2025) and the GPT-5.x family (2025-2026) which unified the o-series reasoning models with the general-purpose GPT line. GPT-5.4 mini and nano were announced on March 17, 2026 as the small-model tier of the GPT-5.4 generation. OpenAI is backed by Microsoft, Khosla, Andreessen Horowitz, Thrive Capital and Sequoia, with total funding above $60 billion and a 2026 valuation above $300 billion.
Unified Transformer (mid-tier, with integrated 'Thinking' tier)
GPT-5.4 mini was announced March 17, 2026 alongside GPT-5.4 nano as the small-model tier of the GPT-5.4 generation. It is a smaller variant of the unified GPT-5.4 architecture, retaining native text + image input, an integrated 'Thinking' tier for reasoning on demand, and the full tool-use API, while running more than 2x faster than GPT-5 mini at significantly lower cost. Pretraining used a similar multi-trillion-token mixture as GPT-5.4 with heavier distillation pressure from larger teacher models. Post-training included supervised fine-tuning, RLHF and reinforcement learning against verifiable rewards on coding, reasoning and tool-use trajectories. On evaluations such as SWE-Bench Pro and OSWorld-Verified, GPT-5.4 mini approaches the performance of full GPT-5.4 while costing roughly one-third as much.
Parameters
Undisclosed (estimated tens of billions of parameters, likely sparse MoE)
Context
400.000 tokens
Mogelijkheden
2x faster than GPT-5 mini at lower cost
Approaches full GPT-5.4 on SWE-Bench Pro and OSWorld-Verified
400K token context window
Native multimodal input: text and images
Integrated 'Thinking' tier activates for harder reasoning
Native tool use, function calling and parallel tool calls
Designed for the subagent era: works well under an orchestrator
Strong coding, classification and extraction performance
Available in ChatGPT, Codex CLI and the OpenAI API
Regional processing endpoints available with 10% uplift
Best for: subagent workflows, customer-facing chat, coding assistants, high-volume API workloads.
Training & licentie
Pretrained on a multi-trillion-token mixture of web text, code, scientific papers and licensed data; heavy distillation from larger GPT-5.4 teacher models. Post-training uses supervised fine-tuning, RLHF and RL against verifiable rewards. Knowledge cutoff approximately late 2025.
Licentie: Proprietary commercial license via OpenAI API and Azure OpenAI.
Veiligheidstests: Evaluated under OpenAI's Preparedness Framework with internal and external red-teaming and capability evaluations.
Bekende beperkingen
Below full GPT-5.4 on the hardest agentic and reasoning benchmarks
Smaller context window than GPT-5.4 (400K vs 1.05M)
No native audio or video input
Knowledge cutoff in late 2025
Thinking mode adds latency and token cost when enabled
curl https://railwail.com/api/v1/chat/completions \
-H "Authorization: Bearer $RAILWAIL_API_KEY" \
-H "Content-Type: application/json" \
-d '{
"model": "gpt-5-4-mini",
"messages": [
{
"role": "user",
"content": "Explain what a vector database is in two sentences."
}
],
"max_tokens": 1024
}'
import os
from openai import OpenAI
client = OpenAI(
api_key=os.environ["RAILWAIL_API_KEY"],
base_url="https://railwail.com/api/v1",
)
completion = client.chat.completions.create(
model="gpt-5-4-mini",
messages=[
{
"role": "user",
"content": "Explain what a vector database is in two sentences.",
},
],
max_tokens=1024,
)
print(completion.choices[0].message.content)
import OpenAI from "openai";
const client = new OpenAI({
apiKey: process.env.RAILWAIL_API_KEY,
baseURL: "https://railwail.com/api/v1",
});
const completion = await client.chat.completions.create({
model: "gpt-5-4-mini",
messages: [
{
role: "user",
content: "Explain what a vector database is in two sentences."
}
],
max_tokens: 1024
});
console.log(completion.choices[0].message.content);
// npm install railwail
import railwail from "railwail";
const rw = railwail(process.env.RAILWAIL_API_KEY);
const res = await rw.chat("gpt-5-4-mini", [
{ role: "user", content: "Explain what a vector database is in two sentences." },
], { max_tokens: 1024 });
console.log(res.choices[0].message.content);
GPT-5.4 Mini is een model van OpenAI in de categorie Multimodaal. Op Railwail kunt u het aanroepen met een API-sleutel via de Railwail-API.
Hoeveel kost GPT-5.4 Mini op Railwail?
Op Railwail kost GPT-5.4 Mini US$Â 0,90 per 1M invoertokens en US$Â 5,40 per 1M uitvoertokens. U betaalt voor wat elke aanvraag daadwerkelijk verbruikt. Gebruik wordt betaald met vooraf gekochte credits; 1 credit is gelijk aan US$Â 0,01.
Wat is het contextvenster van GPT-5.4 Mini?
Het contextvenster van GPT-5.4 Mini bevat 400.000 tokens. Een antwoord kan tot 128.000 tokens lang zijn.
Hoe snel is GPT-5.4 Mini?
Er zijn nog niet genoeg gemeten runs van GPT-5.4 Mini op Railwail om een uitvoeringstijd op te geven. Dit hangt af van de invoer, de instellingen en de belasting bij de provider.
Is GPT-5.4 Mini beter dan BLIP?
Dat hangt van de taak af. GPT-5.4 Mini (OpenAI) en BLIP (Salesforce) zijn beide modellen in de categorie Multimodaal. De vergelijkingspagina toont hun prijzen en specificaties naast elkaar.
Ja. GPT-5.4 Mini accepteert afbeeldingen als invoer naast tekst.
Hoe gebruik ik GPT-5.4 Mini via de API?
Maak een Railwail-API-sleutel aan en stuur uw aanvraag met de model-ID gpt-5-4-mini. Codevoorbeelden voor curl, Python en JavaScript staan in het API-gedeelte van deze pagina.
