GPT-5.5 Instant (June 2026)
Jun 2026
GPT-5.5 Instant (June 2026)Compare inon
Benchmarks of GPT-5.5 Instant (June 2026)17
BenchmarkByScoreRank
Overall1
Knowledge3
Science3
Coding2
Agents4
Health & law1
Documents2
Legacy · saturated or no longer reported1
No benchmark matches
$0.57per task?
API price not publicprice
158 tok/sfirst token in 0.9 s?
400Kcontext
Ranking?
Alternatives?
ModelScoreCostPer taskWhat changes
CheaperGPT-6.1 Solxhigh×2.6-31%$0.39Remove unsupported parameters+5BetterGPT-5.6 Lunamedium+29%-97%$0.016
OpenMiMo v2.6 Prothinking×2.5-77%$0.13Pass back reasoning_content+3
CheaperMiniMax M3.1 Flashthinking×2.4-61%$0.22No strict JSON+1CheaperGPT-6 Solxhigh×2.3-8%$0.52ModelScoreCostPer taskWhat changes
GPT-6.1 Solxhigh×2.6-31%$0.39Remove unsupported parameters+5MiMo v2.6 ProthinkingOpen×2.5-77%$0.13Pass back reasoning_content+3MiniMax M3.1 Flashthinking×2.4-61%$0.22No strict JSON+1GPT-6 Solxhigh×2.3-8%$0.52GPT-6.1 Terramax×2.3-29%$0.40ModelScoreCostPer taskWhat changes
GPT-5.6 Lunamedium+29%-97%$0.016GPT-6 Lunamedium+42%-97%$0.017Function calling only with none · Chat Completions+3
Claude Haiku 5.5low+36%-96%$0.024Remove sampling parameters+5
Ling 3.0 FlashthinkingOpen+19%-95%$0.028Context: 400K → 262K+1MiMo v2.5thinkingOpen+37%-93%$0.042ModelScoreCostPer taskWhat changes
MiMo v2.6 ProthinkingOpen×2.5-77%$0.13Pass back reasoning_content+3
Kimi K3maxOpen×2.4+252%$2.00Sampling parameters are fixed+3
Step 5 PreviewthinkingOpen×2.3+80%$1.03web_search not available · Chat Completions+2
Muse Spark OpenxhighOpen×2.2+48%$0.84Reasoning off leaves output unchanged · Self-hosted / llama.cpp+1
DeepSeek V4.1 Flash 1017maxOpen×2.2-54%$0.26Pass back reasoning_content · Chat Completions+4ModelScoreCostPer taskWhat changes
GPT-6 Astramedium×2.6+171%$1.54Monitoring can return HTTP 403+2GPT-6.1 Solmedium×2.5-62%$0.21Remove unsupported parameters+5GPT-5.3 Codexxhigh×2.1—$1.75 / $14DeprecatedGPT-5.5medium×2.1+35%$0.77Prompts with >272K input tokensGPT-5.6 Solmedium×2.1-11%$0.50GPT-6 Solmedium×2.1-57%$0.25GPT-6.1 Terramedium×2-83%$0.095GPT-5.6 Terramedium+67%-68%$0.18Prompts with >272K input tokensAll OpenAI models →History
2 versionsBenchmarks
all categoriesChat & Knowledge
Humanity's Last Exam19.9#128
AA Omniscience Index3.7#59
CritPt (physics)0#184
AA Omniscience · Accuracy44.4#37
GDP.pdf · AA all-pass20.2#27
MLCR-AA31.7#7
GPQA Diamond82.3#103
Coding
Terminal-Bench 4.012.6#37
SciCode52.5#42
Terminal-Bench 2.134.8#93
Agents & Tool Use
AutomationBench-AA36.4#49
GDPval-AA (work tasks) 2.1508.3#101
τ³-Banking · AA11.8#85
AA-Briefcase 1.1 · Elo1,086.3#53
FAQ
How much does GPT-5.5 Instant (June 2026) cost?›
There is no per-unit API price: API price not public.
Is GPT-5.5 Instant (June 2026) free to use?›
There is no free API.
How good is GPT-5.5 Instant (June 2026), and what is it best at?›
#128 of 360 in Chat & Knowledge, #37 of 137 in Coding, #49 of 138 in Agents & Tool Use, #27 of 138 in Vision & Documents. Strongest at: Knowledge.
Is GPT-5.5 Instant (June 2026) better than GPT-5.5 Instant (May 2026)?›
On Humanity's Last Exam, GPT-5.5 Instant (June 2026) scores 19.9 vs 21.6 — lower.
What is the context window of GPT-5.5 Instant (June 2026)?›
400K tokens.
When was GPT-5.5 Instant (June 2026) released? Is there a newer version?›
Released 2026-06-25. It is the current version in its line.
Is GPT-5.5 Instant (June 2026) open source?›
No, GPT-5.5 Instant (June 2026) is a closed model available through an API. The closest open-weights option here is MiMo v2.6 Pro.
Can GPT-5.5 Instant (June 2026) read images?›
It accepts text and images as input.
What is GPT-5.5 Instant (June 2026)?›
GPT-5.5 Instant (June 2026) is a closed language model from OpenAI, released Jun 2026, the successor to GPT-5.5 Instant (May 2026).
What are the best alternatives to GPT-5.5 Instant (June 2026)?›
GPT-6.1 Sol (cheaper), GPT-5.6 Luna (better), MiMo v2.6 Pro (open weights).