AI Model Watch
Deprecations / Migrate

Migrate off o1

Retired

o1 has been retired and shut down on 23 Oct 2026. OpenAI's official replacement is GPT-5.6 Sol. The cheapest comparable model we track is Amazon Nova Lite (Amazon) at $0.105 per 1M tokens blended.

Last verified: 24 Oct 2026 · sourced from official provider documentation

StatusRetiredOpenAI
Shut down23 Oct 2026deprecated 22 Apr 2026
Official replacementGPT-5.6 Sol$8 /M blendedCheapest alternativeAmazon Nova Lite$0.105 /M blended
What changes

o1 → GPT-5.6 Sol

Moving to GPT-5.6 Sol means 3.3× cheaper ($26.25 → $8 /1M blended) and a larger context window (200K → 1.1M).

Speco1GPT-5.6 Sol
StatusRetiredGA
Blended price /1M$26.25$8
Input / output /1M$15 / $60$4 / $20
Context window200K1.1M
Max output100.000128.000
Modalitytext, imagetext, image
Knowledge cutoff1 Oct 202316 Feb 2026

API string was o1-2024-12-17 → switch to gpt-5.6-sol. See GPT-5.6 Sol's full spec sheet →

Cheapest alternatives

Budget-friendly replacements for o1

Generally-available models that match o1's capabilities (and at least half its 200K context), ranked by blended price. Every number is computed from official catalog prices.

ModelBlended /1MInput / outputContext
Amazon Nova Lite
Amazon
$0.105$0.06 / $0.24300K
Llama 4 Scout (17B-16E Instruct)
Meta
$0.15$0.1 / $0.310M
Ministral 3 8B
Mistral
$0.15$0.15 / $0.15256K
FAQ

Migrating off o1

What replaces o1?

OpenAI's recommended migration for o1 is GPT-5.6 Sol. The cheapest comparable model in our catalog is Amazon Nova Lite (Amazon) at $0.105/1M blended.

Is o1 still available?

No — o1 has been retired (shut down 23 Oct 2026) and is no longer available via OpenAI's API.

What is the cheapest alternative to o1?

Amazon Nova Lite (Amazon) is the cheapest generally-available alternative we track that matches o1's capabilities, at $0.06 per 1M input and $0.24 per 1M output tokens ($0.105/1M blended).

Browse the full deprecation watch → or see o1's full spec sheet →