GPT-5.4
GPT-5.4 is OpenAI's most capable multimodal language model, combining state-of-the-art reasoning with native vision understanding. It sets new benchmarks on coding, math, and instruction-following while remaining fully OpenAI-SDK compatible.
256K tokens
Context window
Text + Vision
Modalities
100+
Languages
Commercial
License
Our pricing
–66% vs official
Input tokens
per 1M tokens
$15.00
$5.10
Output tokens
per 1M tokens
$60.00
$20.40
Pay-as-you-go · No minimums · Cancel anytime
Batch API available — extra 50 % off
Same endpoint as OpenAI (
Start for free →
api.belugapi.com/v1)
No credit card required to test
Capabilities
Everything you need,
ready to use.
Full API parity with the official provider — streaming, tools, vision and more out of the box.
Streaming
Server-sent events out of the box
Function calling
Parallel & nested tool calls
Vision
Analyze images & documents
JSON mode
Structured output, guaranteed
System prompts
Full system message support
Batch API
Up to 50 % extra off on batches
Integration
2-line migration.
Zero friction.
BelugAPI is 100 % compatible with the OpenAI SDK.
Point base_url to our endpoint and
you're done — no refactoring, no learning curve.
Same request & response schema
Python · Node.js · REST · Go · Ruby
Streaming, tool-calling, structured output
Automatic failover & load balancing
Python
from openai import OpenAI client = OpenAI( api_key="bel-your-key", base_url="https://api.belugapi.com/v1" ) response = client.chat.completions.create( model="gpt-5.4", messages=[{"role": "user", "content": "Hello!"}] ) print(response.choices[0].message.content)
Performance
State-of-the-art
benchmarks.
GPT-5.4 tops the leaderboard across reasoning, coding, and math — delivered at a fraction of the official cost.
Full benchmark report →