Skip to content
OneAtlas

GPT Chat Latest

openai/gpt-5.5-instant
OpenAITextClosed weightsReasoningTool callStructured output
Compare 5 providers

Compact GPT model for low-latency assistance and high-volume workloads

Context

400K

400,000 tokens

Max output

128K

128,000 tokens

Input

$5.00

per 1M tokens

Output

$30.00

per 1M tokens

Providers

5

5 listings

Intelligence

—

Not yet scored

Pricing

USD per 1M tokens · listed by ZenMux

Token typeStandard
Input$5.00
Output$30.00
Cache read$0.50

Lowest input price across providers: $2.00.

Capabilities

ReasoningYes

Effort: low, medium, high

Tool callYes
Structured outputYes
TemperatureYes
AttachmentsYes
Interleaved reasoningNo
Open weightsNo
ModeratedUnknown

Input

TextImagePDF

Output

Text

Benchmarks

Published scores and Design Arena Elo

No published benchmark scores for this model yet.

Rankings

Position on each OneAtlas leaderboard

Providers · 5

5 listings

ProviderModel IDContextInput limitOutputInput $Output $Reasoning $Cache readCache writeAudio inAudio outReasoningToolsStructuredTemp.Updated
Azuregpt-chat-latest400K272K128K$5.00$30.00—$0.50———YesYesYesNoMay 28, 2026
Azure Cognitive Servicesgpt-chat-latest400K272K128K$5.00$30.00—$0.50———YesYesYesNoMay 28, 2026
Kilo Gatewayopenai/gpt-chat-latest400K—128K$5.00$30.00—$0.50———NoYesYesNoMay 5, 2026
NanoGPTopenai/gpt-chat-latest1.05M1.05M128K$2.00$10.00—$0.20$2.50——YesYesYesUnknownMay 3, 2026
ZenMuxopenai/chat-latest400K272K128K$5.00$30.00—$0.50———YesYesYesYesMay 28, 2026