GPT-5.5 Instant (June 2026)
GPT-5.5 Instant (June 2026)Alternatives?
CheaperGPT-6.1 Solxhigh×4.3-43%$0.39Remove unsupported parameters+5
BetterClaude Haiku 5.5medium+20%-93%$0.047Remove sampling parameters+5
OpenGLM 5.3max×3.3+190%$2.01No image input+4
CheaperMiMo v2.6 ProthinkingOpen×2.8-81%$0.13Pass back reasoning_content+3
CheaperDeepSeek V4.1 Flash 1017maxOpen×2.7-62%$0.26Pass back reasoning_content · Chat Completions+4GPT-6.1 Solxhigh×4.3-43%$0.39Remove unsupported parameters+5MiMo v2.6 ProthinkingOpen×2.8-81%$0.13Pass back reasoning_content+3DeepSeek V4.1 Flash 1017maxOpen×2.7-62%$0.26Pass back reasoning_content · Chat Completions+4Claude Haiku 5.5max×2.6-69%$0.21Remove sampling parameters+5GLM 5.3 FlashmaxOpen×2.6-59%$0.28Defaults to max · Self-hosted+4Claude Haiku 5.5medium+20%-93%$0.047Remove sampling parameters+5MiMo v2.6 FlashthinkingOpen+80%-91%$0.062Pass back reasoning_content+3GPT-6.1 Sollow×2.4-81%$0.13Remove unsupported parameters+5MiMo v2.6 ProthinkingOpen×2.8-81%$0.13Pass back reasoning_content+3
MiniMax M3.1 Flashthinking×2-68%$0.22Complete model response must be appendedGLM 5.3maxOpen×3.3+190%$2.01No image input+4MiMo v2.6 ProthinkingOpen×2.8-81%$0.13Pass back reasoning_content+3DeepSeek V4.1 Flash 1017maxOpen×2.7-62%$0.26Pass back reasoning_content · Chat Completions+4
Ling 3.1 FlashOpen×2.6+45%$1.00No image input
Step 5 PreviewthinkingOpen×2.6+48%$1.03web_search not available · Chat Completions+2GPT-6 Astramedium×3.9+123%$1.54Monitoring can return HTTP 403+2GPT-6.1 Solmedium×3.8-69%$0.21Remove unsupported parameters+5GPT-6 Solmedium+48%-64%$0.25GPT-5.6 Solmedium+16%-27%$0.50GPT-5.5medium-60%+30%$0.90Prompts with >272K input tokensGPT-6 Lunamedium-80%-97%$0.017Function calling only with none · Chat Completions+3GPT-5.4 Minixhigh-84%-35%$0.45GPT-5.6 Terramedium-92%-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 GPT-6 Luna?›
On Terminal-Bench 4.0, GPT-5.5 Instant (June 2026) scores 12.6 vs 12.6 — about the same. It is 920% 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 GLM 5.3.
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), Claude Haiku 5.5 (better), GLM 5.3 (open weights).