OpenAI retires o3-2025-04-16 on Dec 11, 2026: replacement and cost
- Date
- Dec 11, 2026
- Model
o3-2025-04-16- Named replacement
gpt-5.6-sol- Maker
- OpenAI
The deprecation table names only the dated snapshot. OpenAI's o3 model page lists o3-2025-04-16 as the snapshot behind the alias o3; check which one your calls use.
Price before and after
| Per 1M tokens | Before (o3-2025-04-16) | After (gpt-5.6-sol) |
|---|---|---|
| Input | $2.00 | $4.00 |
| Output | $8.00 | $20.00 |
| Cached input | $0.50 | $0.40 |
| Blended (3 in : 1 out) | $3.50 | $8.00 (+129%) |
List prices, USD. Blended = (3 × input + 1 × output) ÷ 4 — a stated reference mix, not your workload. Prices: developers.openai.com, checked Sep 29, 2026.
Before price is the o3 row on OpenAI's pricing page; OpenAI's o3 model page lists o3-2025-04-16 as its snapshot. The replacement price is GPT-5.6 Sol's promotional rate, which OpenAI says is available at least through November 21, 2026. OpenAI does not publish the rate after the promotion, so the forecast keeps the promotional rate; your cost may be higher once it ends.
Source
“Dec 11, 2026 o3-2025-04-16 gpt-5.6-sol”
https://developers.openai.com/api/docs/deprecations · checked Sep 29, 2026
Same model on other routes
- Azure (Microsoft Foundry):
o3 (version 2025-04-16)— shutdown Nov 19, 2026, replacementgpt-5.6-sol
What it does to your bill
Prefilled with o3. Change the tokens, or add the other models you use.
Example workload — replace with yours.
From announced changes alone, this workload goes from $360/mo in Oct 2026 to $800/mo in Mar 2027 (+122.2%).
Heads-up: GPT-5.6 Sol: promotional price, available at least through Nov 21, 2026. The forecast keeps today's rate because the later rate is not published.
Month-by-month table
| Month | Cost |
|---|---|
| Oct 2026 | $360.00 |
| Nov 2026 | $360.00 |
| Dec 2026 | $658.06 |
| Jan 2027 | $800.00 |
| Feb 2027 | $800.00 |
| Mar 2027 | $800.00 |
| # | Date | Change | $/mo change | Source |
|---|---|---|---|---|
| 1 | Dec 11, 2026 | o3 → gpt-5.6-sol | +$440.00 | developers.openai.com |
The replacement is the provider's named replacement, not our recommendation; quality and behavior can differ.
This link contains the numbers you entered.
Methodology and limits
Prices are list prices in USD per 1M tokens from the provider's pricing page; dates and named replacements come from the provider's deprecation page, quoted above with the date we last checked. The replacement is the provider's named replacement, not our recommendation — quality and behavior can differ. Discounts, committed-use or enterprise agreements, batch and regional pricing, and Azure OpenAI and Amazon Bedrock prices are not included. Dates marked "at least through" or "not before" are shown but never applied.Full methodology →