OpenAI model product
GPT-5.5-Instant
5-Instant is an OpenAI large language model released as the default ChatGPT model on May 5, 2026.
Updated Oct 23, 2026. Default version: GPT-5.5 Instant
LLMBoard Score51.6GPT-5.5 Instant
Coverage20%9 benchmark families
Context window400KTokens
Official input priceN/AOfficial price unavailable
GPT-5.5-Instant Capability Profile
This profile uses the model's current scored version. Arena ratings and prices are shown separately.
GPT-5.5-Instant Benchmark Results
Benchmark scores for GPT-5.5 Instant.
Sort by
Benchmark | Score | Rank | Participants | Percentile | Evidence | Evaluated |
|---|
| BenchmarkHealthBench Consensus | Score94.70% | Rank05 | Participants5 | Percentile0.00% | EvidenceC | Evaluated |
| BenchmarkHealthBench Hard | Score22.90% | Rank08 | Participants11 | Percentile30.00% | EvidenceC | Evaluated |
| BenchmarkOmniDocBench 1.5 | Score87.50% | Rank11 | Participants20 | Percentile47.37% | EvidenceC | Evaluated |
| BenchmarkHealthBench | Score51.40% | Rank12 | Participants14 | Percentile15.38% | EvidenceC | Evaluated |
| BenchmarkHealthBench Professional | Score38.40% | Rank19 | Participants20 | Percentile5.26% | EvidenceC | Evaluated |
| BenchmarkCharXiv-R | Score81.60% | Rank22 | Participants60 | Percentile64.41% | EvidenceC | Evaluated |
| BenchmarkLM Arena Document Style Control | Score1,460.32 rating | Rank22 | Participants38 | Percentile43.24% | EvidenceA | Evaluated |
| BenchmarkLM Arena Vision Style Control | Score1,276.06 rating | Rank24 | Participants113 | Percentile79.46% | EvidenceA | Evaluated |
| BenchmarkMMMU-Pro | Score76.00% | Rank30 | Participants73 | Percentile59.72% | EvidenceC | Evaluated |
| BenchmarkLM Arena Text Style Control | Score1,473.01 rating | Rank32 | Participants218 | Percentile85.71% | EvidenceA | Evaluated |
| BenchmarkLM Arena Document | Score1,402.95 rating | Rank38 | Participants38 | Percentile0.00% | EvidenceA | Evaluated |
| BenchmarkLM Arena Vision | Score1,249.81 rating | Rank49 | Participants113 | Percentile57.14% | EvidenceA | Evaluated |
| BenchmarkGPQA | Score85.60% | Rank66 | Participants256 | Percentile74.51% | EvidenceC | Evaluated |
| BenchmarkLM Arena Text Factuality | Score1,442.86 rating | Rank67 | Participants131 | Percentile49.23% | EvidenceA | Evaluated |
| BenchmarkAIME 2025 | Score81.20% | Rank73 | Participants122 | Percentile40.50% | EvidenceC | Evaluated |
| BenchmarkLM Arena Text | Score1,419.05 rating | Rank92 | Participants218 | Percentile58.06% | EvidenceA | Evaluated |
GPT-5.5-Instant Arena Results
Preference and agent-evaluation results for the default version.
Sort by
Arena | Category | Rank | Rating / score | Votes | Observations | Result date |
|---|
| Arenatext style control | Categoryspanish | Rank11 | Rating / score1,485.03 | Votes813 | ObservationsN/A | Result date |
| Arenavision style control | Categoryhumor | Rank11 | Rating / score1,286.97 | Votes241 | ObservationsN/A | Result date |
| Arenatext style control | Categorykorean | Rank18 | Rating / score1,452.34 | Votes430 | ObservationsN/A | Result date |
| Arenavision style control | Categoryenglish | Rank19 | Rating / score1,277.93 | Votes3,328 | ObservationsN/A | Result date |
| Arenavision style control | Categorydiagram | Rank20 | Rating / score1,309.98 | Votes2,193 | ObservationsN/A | Result date |
| Arenatext style control | Categorypolish | Rank21 | Rating / score1,480.26 | Votes574 | ObservationsN/A | Result date |
| Arenavision style control | Categorycreative writing vision | Rank21 | Rating / score1,271.10 | Votes361 | ObservationsN/A | Result date |
| Arenadocument style control | Categoryoverall | Rank22 | Rating / score1,460.32 | Votes8,497 | ObservationsN/A | Result date |
| Arenatext style control | Categorynon english | Rank22 | Rating / score1,469.11 | Votes14,227 | ObservationsN/A | Result date |
| Arenatext style control | Categoryindustry business and management and financial operations | Rank23 | Rating / score1,475.77 | Votes5,681 | ObservationsN/A | Result date |
| Arenatext style control | Categoryjapanese | Rank23 | Rating / score1,463.48 | Votes266 | ObservationsN/A | Result date |
| Arenatext style control | Categorycreative writing | Rank24 | Rating / score1,455.03 | Votes4,350 | ObservationsN/A | Result date |
| Arenatext style control | Categoryindustry entertainment and sports and media | Rank24 | Rating / score1,451.69 | Votes5,802 | ObservationsN/A | Result date |
| Arenavision style control | Categoryoverall | Rank24 | Rating / score1,276.06 | Votes7,590 | ObservationsN/A | Result date |
| Arenatext style control | Categorymulti turn | Rank25 | Rating / score1,482.51 | Votes5,126 | ObservationsN/A | Result date |
| Arenavision style control | Categoryocr | Rank25 | Rating / score1,285.71 | Votes5,653 | ObservationsN/A | Result date |
| Arenatext style control | Categoryfrench | Rank27 | Rating / score1,492.18 | Votes1,048 | ObservationsN/A | Result date |
| Arenatext style control | Categoryrussian | Rank27 | Rating / score1,477.74 | Votes3,019 | ObservationsN/A | Result date |
| Arenatext style control | Categoryindustry life and physical and social science | Rank28 | Rating / score1,492.51 | Votes4,494 | ObservationsN/A | Result date |
| Arenatext style control | Categoryindustry writing and literature and language | Rank29 | Rating / score1,459.85 | Votes6,676 | ObservationsN/A | Result date |
| Arenatext style control | Categoryindustry medicine and healthcare | Rank30 | Rating / score1,486.99 | Votes2,067 | ObservationsN/A | Result date |
| Arenatext style control | Categoryexclude ties | Rank31 | Rating / score1,484.28 | Votes21,306 | ObservationsN/A | Result date |
| Arenatext style control | Categoryoverall | Rank32 | Rating / score1,473.01 | Votes27,154 | ObservationsN/A | Result date |
| Arenatext style control | Categoryindustry legal and government | Rank33 | Rating / score1,476.79 | Votes2,299 | ObservationsN/A | Result date |
| Arenatext style control | Categoryhard prompts | Rank35 | Rating / score1,491.15 | Votes18,434 | ObservationsN/A | Result date |
| Arenavision | Categorycreative writing vision | Rank35 | Rating / score1,259.45 | Votes361 | ObservationsN/A | Result date |
| Arenavision style control | Categorychinese | Rank35 | Rating / score1,294.86 | Votes494 | ObservationsN/A | Result date |
| Arenatext style control | Categoryenglish | Rank36 | Rating / score1,473.24 | Votes12,927 | ObservationsN/A | Result date |
| Arenatext style control | Categorygerman | Rank36 | Rating / score1,466.73 | Votes430 | ObservationsN/A | Result date |
| Arenavision | Categoryhumor | Rank36 | Rating / score1,261.11 | Votes241 | ObservationsN/A | Result date |
GPT-5.5-Instant Pricing
Official vendor API pricing appears first, followed by individual provider offers.
- Official API
- N/A
- Official provider
- N/A
- Lowest third-party
- From $5 input, $30 output per 1M via ZenMux
- Tracked offerings
- 1
Sort by
Provider | Provider model ID | Region | Input / 1M | Output / 1M | Context | Updated |
|---|
| ProviderZenMux | Provider model IDopenai/gpt-5.5-instant | Regionglobal | Input / 1M$5 | Output / 1M$30 | Context400K | Updated |
Official prices use only the vendor's configured official Provider and positive standard USD PAYG rates. Third-party offers remain explicitly labeled.
GPT-5.5-Instant Runtime Performance
Provider-specific output speed and catalog latency for GPT-5.5 Instant. Runtime does not affect the capability score.
Sort by
Provider | Output Speed | Catalog Latency | Max Input | Max Output | Updated |
|---|
| ProviderOpenAI | Output Speed100.00 tok/s | Catalog Latency2.00 s | Max Input400K | Max Output128K | Updated |
Output Speed is generated output tokens received per second. Catalog latency is reported separately from observed provider TTFT.
GPT-5.5-Instant Specifications
Technical details for the model's default version.
- Version
- GPT-5.5 Instant
- Released
- May 5, 2026
- Knowledge cutoff
- Aug 31, 2025
- Parameters
- N/A
- Context window
- 400K
- Max output
- 128K
- Inputs
- image, text
- Outputs
- text
- Open weights
- No
- License
- Proprietary
GPT-5.5-Instant Versions
Available versions of this model. The score column identifies the version used in the overall ranking.
Sort by
Version | Released | LLMBoard | Parameters | Context | Max output | Open weights | License |
|---|
| VersionGPT-5.5 Instant | Released | LLMBoard51.62 | ParametersN/A | Context400K | Max output128K | Open weightsNo | LicenseProprietary |
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What is GPT-5.5-Instant?
Key information about GPT-5.5-Instant and its available data.
3 Instant in factuality, everyday reasoning, image understanding, STEM answers, concision, conversational tone, and personalization. In the API, it is available through the chat-latest alias, which points to the latest Instant model used in ChatGPT.
Data as of 2026-10-22.
FAQ
Common questions about GPT-5.5-Instant.
When was GPT-5.5-Instant released?
GPT-5.5-Instant's default version was released on May 5, 2026.
How much does GPT-5.5-Instant cost?
No official standard PAYG price is currently available for GPT-5.5-Instant. The lowest tracked third-party offer starts at $5 input and $30 output via ZenMux.
Who created GPT-5.5-Instant?
GPT-5.5-Instant was created by OpenAI.
What is the context window for GPT-5.5-Instant?
The default version has a 400K token context window.
Is GPT-5.5-Instant open weight?
No. The default version is not marked as having publicly available weights.
How many API providers offer GPT-5.5-Instant?
1 provider offerings are linked to the default version.