Migrating from gpt-5.4-pro to gpt-5.5-pro
What changes when you move from gpt-5.4-pro to gpt-5.5-pro: input price 0%, output price 0%.
- From
- gpt-5.4-pro
- Status
- Active
- Shutdown
- none announced
- Time left
- —
- Status
- Active
- Shutdown
- none announced
- Time left
- —
Prices
USD per 1M tokens, standard tier| Type | gpt-5.4-pro | gpt-5.5-pro | Change |
|---|---|---|---|
| Input | $30.00first seen October 1, 2026 · source | $30.00first seen October 1, 2026 · source | 0% |
| Output | $180.00first seen October 1, 2026 · source | $180.00first seen October 1, 2026 · source | 0% |
At 1M input and 250K output tokens a month: $75.00 on gpt-5.4-pro, $75.00 on gpt-5.5-pro (0%).
Other tiers, prompt-size bands and modalities are on each model's page.
Limits
Tokens| Limit | gpt-5.4-pro | gpt-5.5-pro | Change |
|---|---|---|---|
| Context window | 1,050,000 tokensin place when tracking began (October 7, 2026) · source | 1,050,000 tokensin place when tracking began (October 7, 2026) · source | 0% |
| Max output tokens | 128,000 tokensin place when tracking began (October 7, 2026) · source | 128,000 tokensin place when tracking began (October 7, 2026) · source | 0% |
Benchmarks
Same benchmark, source and setting on both sides| Benchmark | gpt-5.4-pro | gpt-5.5-pro | Change |
|---|---|---|---|
| FrontierMath Tier 4Epoch AI, xhigh effort. | 58.5% | 78.0% | +19.5 pts |
| FrontierMath Tiers 1-3Epoch AI, xhigh effort. | 82.5% | 87.7% | +5.2 pts |
A score from one source is never compared with another source's, and company-reported scores are compared only within the same company; settings named where they differ. Data: Epoch AI, Capabilities & benchmarking (epoch.ai/benchmarks), CC BY.
Features and parameters
Compare models- Batch API: not supported on gpt-5.4-pro, supported on gpt-5.5-pro.gpt-5.4-pro: in place when tracking began (October 7, 2026) · source · gpt-5.5-pro: in place when tracking began (October 7, 2026) · source
Same on both
- Function calling: supported on both.gpt-5.4-pro: in place when tracking began (October 7, 2026) · source · gpt-5.5-pro: in place when tracking began (October 7, 2026) · source
- Image input: supported on both.gpt-5.4-pro: in place when tracking began (October 7, 2026) · source · gpt-5.5-pro: in place when tracking began (October 7, 2026) · source
- Reasoning / thinking: supported on both.gpt-5.4-pro: in place when tracking began (October 7, 2026) · source · gpt-5.5-pro: in place when tracking began (October 7, 2026) · source
- Fine-tuning: not supported on both.gpt-5.4-pro: in place when tracking began (October 7, 2026) · source · gpt-5.5-pro: in place when tracking began (October 7, 2026) · source
- Built-in web search: supported on both.gpt-5.4-pro: in place when tracking began (October 7, 2026) · source · gpt-5.5-pro: in place when tracking began (October 7, 2026) · source
Not published for gpt-5.4-pro: Structured outputs, Prompt caching, PDF input, temperature parameter, top_p parameter, logprobs.
Not published for gpt-5.5-pro: Prompt caching, PDF input, temperature parameter, top_p parameter, logprobs.
Aliases
All aliasesNo aliases point at either model.
On cloud platforms
All platform dates| Model | Platform | Platform ID | Shutdown | Time left |
|---|---|---|---|---|
| gpt-5.4-pro | Microsoft Foundryversion 2026-03-05 | gpt-5.4-pro | Sep 7, 2027Active | 327 days |
Read daily from each platform's own pages. The status above uses each company's own date. Time left counts to 00:00 UTC on the shutdown date, which is the evening before in ET.
Checklist
- Change the model string from
gpt-5.4-protogpt-5.5-pro.
Compared from AIWire's published data when this page loaded. Each fact links to the page it came from. Model pages: gpt-5.4-pro, gpt-5.5-pro.