GPT-5.5 Instant
OpenAIGPTProprietary
Description
GPT-5.5 Instant is OpenAI's latest Instant model and the default ChatGPT model released on May 5, 2026. It improves factuality, everyday reasoning, image understanding, STEM answers, concision, conversational tone, and personalization over GPT-5.3 Instant. In the API, it is exposed through the chat-latest alias, which points to the latest Instant model used in ChatGPT.
Release Date
2026-05-05
Parameters
—
Context Length
—
Modalities
image, text
Capability Radar
70
general
0
coding
80
reasoning
77
scienceest.
56
agents
80
multimodal
Science is estimated from LLM Stats science scores or reasoning when no dedicated science benchmarks are available.
Rankings
| Domain | #Rank | Score | Source |
|---|---|---|---|
| Multimodal Ranking | 37 | 53.0 | LS |
Benchmark Scores (LLM Stats)
(LLM Stats (zeroeval))Biology
GPQANYU + Cohere + Anthropic (2023)
85.6%SR
General
MMMU-Pro
76.0%SR
Healthcare
HealthBench Consensus
94.7%SR
HealthBench
51.4%SR
HealthBench Professional
38.4%SR
HealthBench Hard
22.9%SR
Math
AIME 2025
81.2%SR
Multimodal
OmniDocBench 1.5
87.5%SR
CharXiv-R
81.6%SR
AA Evaluation Indices
(Artificial Analysis)No AA evaluation data available
LLM Stats Category Scores
(LLM Stats (zeroeval))Physics90
Structured Output90
Biology90
Chemistry90
Math80
Multimodal80
Reasoning80
Vision80
General70
Healthcare50
Pricing
Input Price$0.00001 / 1M tokens
Output Price$0.00003 / 1M tokens
Blended Price (3:1)$0.00001 / 1M tokens
Speed
No speed data available
Provider Price Ranking
Provider Price Ranking
1 providers
ProviderInputOutput
1OpenAIPRIMARY
$0.00001
$0.00003
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