#164
OP
GPT-4.1-nano
OpenAI
11.4 LLMBoard
OpenAI model product
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.
Updated Aug 10, 2026. Default version: GPT-5.5 Instant
Structured fields from the published default version.
This profile uses the latest version under this unique model that has a calculated LLMBoard score. Arena and price are excluded.
No published version under this unique model currently has enough benchmark coverage to calculate a score.
Published benchmark records for the scored version currently unavailable.
No published benchmark result is linked to the scored version.
Preference and agent-evaluation signals from published Arena datasets.
| vision style control | humor | 6 | 1296.8 | 245 | N/A | |
| text style control | spanish | 8 | 1485.2 | 759 | N/A | |
| text style control | korean | 11 | 1455.4 | 422 | N/A | |
| text style control | polish | 15 | 1487.7 | 555 | N/A | |
| vision style control | diagram | 15 | 1315.2 | 2,083 | N/A | |
| vision style control | english | 15 | 1279.6 | 3,162 | N/A | |
| text style control | japanese | 19 | 1462.4 | 255 | N/A | |
| text style control | non english | 19 | 1470.6 | 13,367 | N/A | |
| text style control | industry entertainment and sports and media | 20 | 1453.0 | 5,423 | N/A | |
| text style control | creative writing | 22 | 1457.1 | 4,075 | N/A | |
| document style control | overall | 23 | 1455.4 | 8,442 | N/A | |
| text style control | industry business and management and financial operations | 23 | 1476.3 | 5,337 | N/A | |
| vision style control | creative writing vision | 23 | 1263.3 | 325 | N/A | |
| text style control | industry life and physical and social science | 24 | 1491.1 | 4,164 | N/A | |
| vision style control | overall | 24 | 1278.0 | 7,224 | N/A | |
| text style control | exclude ties | 25 | 1484.7 | 20,097 | N/A | |
| text style control | industry writing and literature and language | 25 | 1463.2 | 6,217 | N/A | |
| text style control | overall | 26 | 1473.5 | 25,642 | N/A | |
| text style control | french | 26 | 1490.5 | 1,005 | N/A | |
| vision | humor | 26 | 1272.6 | 245 | N/A | |
| text style control | multi turn | 27 | 1483.0 | 4,842 | N/A | |
| vision style control | ocr | 27 | 1285.7 | 5,398 | N/A | |
| text style control | russian | 28 | 1478.0 | 2,773 | N/A | |
| text style control | industry medicine and healthcare | 29 | 1487.0 | 1,941 | N/A | |
| text style control | industry legal and government | 30 | 1478.1 | 2,149 | N/A | |
| text style control | coding | 33 | 1514.6 | 7,461 | N/A | |
| text style control | hard prompts | 33 | 1491.2 | 17,272 | N/A | |
| text style control | industry software and it services | 34 | 1503.5 | 10,530 | N/A | |
| document | overall | 36 | 1401.6 | 8,442 | N/A | |
| text style control | chinese | 36 | 1507.5 | 1,456 | N/A | |
| vision | diagram | 36 | 1276.8 | 2,083 | N/A | |
| vision style control | homework | 36 | 1281.8 | 1,127 | N/A | |
| text factuality | french | 39 | 1464.3 | 800 | N/A | |
| text style control | english | 39 | 1473.0 | 12,275 | N/A | |
| text style control | longer query | 39 | 1475.4 | 11,542 | N/A | |
| text style control | german | 41 | 1462.2 | 420 | N/A | |
| text style control | hard prompts english | 41 | 1488.9 | 8,658 | N/A | |
| text style control | instruction following | 41 | 1456.3 | 8,996 | N/A | |
| vision | creative writing vision | 41 | 1249.7 | 325 | N/A | |
| vision style control | chinese | 43 | 1277.6 | 441 | N/A | |
| vision | overall | 44 | 1251.5 | 7,224 | N/A | |
| vision | english | 44 | 1255.4 | 3,162 | N/A | |
| text factuality | chinese | 45 | 1488.3 | 1,239 | N/A | |
| vision | ocr | 45 | 1257.2 | 5,398 | N/A | |
| text style control | math | 46 | 1463.1 | 1,451 | N/A | |
| text | japanese | 49 | 1407.4 | 255 | N/A | |
| text factuality | industry writing and literature and language | 49 | 1438.5 | 5,761 | N/A | |
| vision | chinese | 49 | 1271.0 | 441 | N/A | |
| text factuality | creative writing | 50 | 1430.4 | 3,574 | N/A | |
| text factuality | russian | 52 | 1453.9 | 2,398 | N/A | |
| text factuality | industry entertainment and sports and media | 53 | 1423.5 | 4,990 | N/A | |
| text factuality | industry legal and government | 53 | 1461.6 | 1,841 | N/A | |
| text | creative writing | 54 | 1420.5 | 4,075 | N/A | |
| text | industry writing and literature and language | 55 | 1425.4 | 6,217 | N/A | |
| text factuality | non english | 55 | 1436.8 | 13,367 | N/A | |
| vision | homework | 55 | 1252.3 | 1,127 | N/A | |
| text factuality | math | 56 | 1434.0 | 1,249 | N/A | |
| text style control | expert | 56 | 1479.8 | 2,450 | N/A | |
| text factuality | multi turn | 57 | 1459.6 | 4,254 | N/A | |
| text | korean | 59 | 1394.6 | 422 | N/A | |
| text style control | industry mathematical | 59 | 1454.9 | 1,502 | N/A | |
| text | industry entertainment and sports and media | 61 | 1407.7 | 5,423 | N/A | |
| text factuality | hard prompts | 63 | 1466.5 | 17,272 | N/A | |
| text | russian | 64 | 1430.5 | 2,773 | N/A | |
| text factuality | overall | 67 | 1444.6 | 25,642 | N/A | |
| text factuality | longer query | 67 | 1454.1 | 11,139 | N/A | |
| text factuality | industry mathematical | 69 | 1423.1 | 1,259 | N/A | |
| text factuality | instruction following | 69 | 1435.7 | 8,505 | N/A | |
| text factuality | industry business and management and financial operations | 70 | 1443.4 | 4,770 | N/A | |
| text factuality | exclude ties | 71 | 1441.5 | 20,097 | N/A | |
| text factuality | expert | 73 | 1454.5 | 2,100 | N/A | |
| text | non english | 75 | 1417.6 | 13,367 | N/A | |
| text | multi turn | 76 | 1434.4 | 4,842 | N/A | |
| text | spanish | 76 | 1430.2 | 759 | N/A | |
| text | polish | 77 | 1421.2 | 555 | N/A | |
| text factuality | industry medicine and healthcare | 77 | 1460.0 | 1,636 | N/A | |
| text factuality | industry life and physical and social science | 78 | 1458.7 | 3,704 | N/A | |
| text factuality | hard prompts english | 79 | 1467.5 | 8,233 | N/A | |
| text factuality | coding | 82 | 1482.3 | 6,998 | N/A | |
| text factuality | english | 84 | 1447.0 | 12,275 | N/A | |
| text factuality | industry software and it services | 85 | 1471.6 | 10,331 | N/A | |
| text | longer query | 86 | 1422.9 | 11,542 | N/A | |
| text | instruction following | 88 | 1407.9 | 8,996 | N/A | |
| text | math | 94 | 1422.8 | 1,451 | N/A | |
| text | chinese | 95 | 1459.5 | 1,456 | N/A | |
| text | exclude ties | 96 | 1408.7 | 20,097 | N/A | |
| text | overall | 97 | 1419.7 | 25,642 | N/A | |
| text | german | 98 | 1406.2 | 420 | N/A | |
| text | french | 99 | 1426.7 | 1,005 | N/A | |
| text | hard prompts | 99 | 1427.1 | 17,272 | N/A | |
| text | industry business and management and financial operations | 101 | 1410.5 | 5,337 | N/A | |
| text | industry legal and government | 103 | 1421.7 | 2,149 | N/A | |
| text | coding | 104 | 1434.7 | 7,461 | N/A | |
| text | industry life and physical and social science | 108 | 1427.3 | 4,164 | N/A | |
| text | hard prompts english | 112 | 1423.1 | 8,658 | N/A | |
| text | industry software and it services | 112 | 1433.2 | 10,530 | N/A | |
| text | expert | 114 | 1415.8 | 2,450 | N/A | |
| text | english | 115 | 1418.4 | 12,275 | N/A | |
| text | industry mathematical | 120 | 1411.9 | 1,502 | N/A | |
| text | industry medicine and healthcare | 122 | 1413.3 | 1,941 | N/A |
Official vendor API PAYG pricing is summarized first. The table then lists individual provider offerings without treating their minimum as the official price.
The default version has no provider offering with current input or output token prices.
Official prices use only the vendor's configured official Provider and positive standard USD PAYG rates. Third-party offers remain explicitly labeled.
All published versions linked to this unique model. The score columns identify the version used by the current overall ranking.
| GPT-5.5 Instant | N/A | N/A | 400K | 128K | No | Proprietary |
A concise description based on the published model registry.
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.
Use the benchmark, Arena and pricing sections above as separate evidence. A missing field means the current data snapshot does not support that claim.
Data snapshot: 2026-08-07. Editorial model content is not available in the backend.
Recommendations prioritize the same model type and family, then the closest published LLMBoard score.
Common questions about GPT-5.5-Instant.
GPT-5.5-Instant's default version was released on May 5, 2026.
No official standard PAYG price is currently available for GPT-5.5-Instant.
GPT-5.5-Instant is published under OpenAI in the model registry.
The default version has a 400K token context window.
No. The default version is not marked as having publicly available weights.
No published provider offering is currently linked to the default version.
No nearby ranked alternatives are currently available.