GPT-5.5 Instant (June 2026)
Jun 2026
GPT-5.5 Instant (June 2026)Compare inon
GPT-5.5 Instant (June 2026) measured on 3 of 28 Coding benchmarks3
BenchmarkByScoreRank
Coding1
Agents2
No benchmark matches
$0.69per task?
API price not publicprice
167 tok/sfirst token in 0.9 s?
400Kcontext
Alternatives?
ModelScoreCostPer taskWhat changes
CheaperMiMo v2.6 ProthinkingOpen+16%-81%$0.13Pass back reasoning_content+3BetterGPT-6 Lunamax+4%-90%$0.068Function calling only with none · Chat Completions+3
CheaperClaude Opus 5.5low+11%-20%$0.55No forced tool use+5CheaperGPT-5.6 Solmedium+9%-27%$0.50
CheaperDeepSeek V4.1 Flash 1017maxOpen+6%-62%$0.26Pass back reasoning_content · Chat Completions+4ModelScoreCostPer taskWhat changes
MiMo v2.6 ProthinkingOpen+16%-81%$0.13Pass back reasoning_content+3Claude Opus 5.5low+11%-20%$0.55No forced tool use+5GPT-5.6 Solmedium+9%-27%$0.50DeepSeek V4.1 Flash 1017maxOpen+6%-62%$0.26Pass back reasoning_content · Chat Completions+4GPT-6.1 Solhigh+6%-54%$0.32Remove unsupported parameters+5ModelScoreCostPer taskWhat changes
GPT-6 Lunamax+4%-90%$0.068Function calling only with none · Chat Completions+3MiMo v2.6 ProthinkingOpen+16%-81%$0.13Pass back reasoning_content+3Claude Haiku 5.5max+5%-69%$0.21Remove sampling parameters+5GPT-5.6 Sollow+7%-62%$0.26DeepSeek V4.1 Flash 1017maxOpen+6%-62%$0.26Pass back reasoning_content · Chat Completions+4ModelScoreCostPer taskWhat changes
MiMo v2.6 ProthinkingOpen+16%-81%$0.13Pass back reasoning_content+3
Kimi K3maxOpen+13%+189%$2.00Sampling parameters are fixed+3
GLM 5.3maxOpen+12%+190%$2.01No image input+4
Step 5 PreviewthinkingOpen+12%+48%$1.03web_search not available · Chat Completions+2
Muse Spark OpenxhighOpen+11%+22%$0.84Reasoning off leaves output unchanged · Self-hosted / llama.cpp+1ModelScoreCostPer taskWhat changes
GPT-5.6 Solmedium+9%-27%$0.50GPT-5.5medium+4%+30%$0.90Prompts with >272K input tokensGPT-6 Astramedium+3%+123%$1.54Monitoring can return HTTP 403+2GPT-6 Solmedium+2%-64%$0.25GPT-6.1 Solmediumsame-69%$0.21Remove unsupported parameters+5GPT-5.4 Minixhighsame-35%$0.45GPT-6 Lunamedium-3%-97%$0.017Function calling only with none · Chat Completions+3GPT-5.6 Terramedium-4%-73%$0.18Prompts with >272K input tokensAll OpenAI models →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?›
#125 of 334 in Chat & Knowledge, #34 of 132 in Coding, #46 of 133 in Agents & Tool Use, #25 of 133 in Vision & Documents. Strongest at: Knowledge.
Is GPT-5.5 Instant (June 2026) better than MiniMax M3.1 Flash?›
On SciCode, GPT-5.5 Instant (June 2026) scores 52.5 vs 53.4 — about the same. It is 214% more expensive per task.
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)?›
MiMo v2.6 Pro (cheaper), GPT-6 Luna (better).