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.
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Om GPT-5.4 Mini
Kort sagtPer 23. september 2026
GPT-5.4 Mini er en modell fra OpenAI i kategorien Multimodal. På Railwail koster GPT-5.4 Mini 0,90 USD per 1M inndatatokens og 5,40 USD per 1M utdatatokens. Kontekstvinduet inneholder 400 000 tokens, og ett svar kan være opptil 128 000 tokens langt.
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.
Bakgrunn
Om OpenAI
Grunnlagt 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.
Parametere
Undisclosed (estimated tens of billions of parameters, likely sparse MoE)
Kontekst
400 000 tokens
Evner
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.
Trening og lisens
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.
Lisens: Proprietary commercial license via OpenAI API and Azure OpenAI.
Sikkerhetstesting: Evaluated under OpenAI's Preparedness Framework with internal and external red-teaming and capability evaluations.
Kjente begrensninger
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 er en modell fra OpenAI i kategorien Multimodal. På Railwail kan du kalle den med en API-nøkkel gjennom Railwail API.
Hvor mye koster GPT-5.4 Mini på Railwail?
På Railwail koster GPT-5.4 Mini 0,90 USD per 1M inndatatokens og 5,40 USD per 1M utdatatokens. Du betaler for det hver forespørsel faktisk bruker. Bruk betales fra forhåndskjøpte kreditter; 1 kreditt tilsvarer 0,01 USD.
Hvor stort er kontekstvinduet til GPT-5.4 Mini?
Kontekstvinduet til GPT-5.4 Mini inneholder 400 000 tokens. Ett svar kan være opptil 128 000 tokens langt.
Hvor rask er GPT-5.4 Mini?
Det finnes ennå ikke nok målte kjøringer av GPT-5.4 Mini på Railwail til å angi en kjøretid. Det avhenger av inndataene, innstillingene og belastningen hos leverandøren.
Er GPT-5.4 Mini bedre enn BLIP?
Det avhenger av oppgaven. GPT-5.4 Mini (OpenAI) og BLIP (Salesforce) er begge modeller i kategorien Multimodal. Sammenligningssiden viser prisene og spesifikasjonene deres side ved side.
Ja. GPT-5.4 Mini godtar bilder som inndata i tillegg til tekst.
Hvordan bruker jeg GPT-5.4 Mini gjennom API-en?
Opprett en Railwail API-nøkkel og send forespørselen din med modell-ID-en gpt-5-4-mini. Kodeeksempler for curl, Python og JavaScript finnes i API-delen av denne siden.
