Migrating from gpt-5 to gpt-5.1
What changes when you move from gpt-5 to gpt-5.1: input price 0%, output price 0%.
- From
- gpt-5
- Status
- Active
- Shutdown
- none announced
- Time left
- —
- To
- gpt-5.1
- Status
- Deprecated
- Shutdown
- Apr 1, 2027
- Time left
- 168 days
gpt-5.1 is itself deprecated, shutting down Apr 1, 2027. Its replacement is gpt-6-sol.
Prices
USD per 1M tokens, standard tier| Type | gpt-5 | gpt-5.1 | Change |
|---|---|---|---|
| Input | $1.25first seen October 1, 2026 · source | $1.25first seen October 1, 2026 · source | 0% |
| Cached input | $0.125first seen October 1, 2026 · source | $0.125first seen October 1, 2026 · source | 0% |
| Output | $10.00first seen October 1, 2026 · source | $10.00first seen October 1, 2026 · source | 0% |
At 1M input and 250K output tokens a month: $3.75 on gpt-5, $3.75 on gpt-5.1 (0%).
Other tiers, prompt-size bands and modalities are on each model's page.
Limits
Tokens| Limit | gpt-5 | gpt-5.1 | Change |
|---|---|---|---|
| Context window | 400,000 tokensin place when tracking began (October 7, 2026) · source | 400,000 tokensin place when tracking began (October 6, 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 6, 2026) · source | 0% |
Benchmarks
Same benchmark, source and setting on both sides| Benchmark | gpt-5 | gpt-5.1 | Change |
|---|---|---|---|
Arena TextArena, high effort. Ranges don't overlap.Other settings
| 1435 ±5 | 1456 ±4 | +21 |
Arena Text: CodingArena, high effort. Ranges don't overlap.Other settings
| 1471 ±8 | 1492 ±7 | +21 |
Arena WebDevArena, medium effort.Other settings
| 1417 ±16 | 1395 ±12 | −22 within range |
Arena VisionArena, high effort. Ranges don't overlap.Other settings
| 1210 ±7 | 1251 ±8 | +41 |
| Arena SearchArena. | 1188 ±7 | 1184 ±5 | −4 within range |
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: Arena (arena.ai), CC BY 4.0.
Features and parameters
Compare modelsSame on both
- Structured outputs: supported on both.gpt-5: in place when tracking began (October 7, 2026) · source · gpt-5.1: in place when tracking began (October 6, 2026) · source
- Function calling: supported on both.gpt-5: in place when tracking began (October 7, 2026) · source · gpt-5.1: in place when tracking began (October 6, 2026) · source
- Prompt caching: supported on both.gpt-5: in place when tracking began (October 7, 2026) · source · gpt-5.1: in place when tracking began (October 6, 2026) · source
- Batch API: supported on both.gpt-5: in place when tracking began (October 7, 2026) · source · gpt-5.1: in place when tracking began (October 6, 2026) · source
- Image input: supported on both.gpt-5: in place when tracking began (October 7, 2026) · source · gpt-5.1: in place when tracking began (October 6, 2026) · source
- Reasoning / thinking: supported on both.gpt-5: in place when tracking began (October 7, 2026) · source · gpt-5.1: in place when tracking began (October 6, 2026) · source
- Fine-tuning: not supported on both.gpt-5: in place when tracking began (October 7, 2026) · source · gpt-5.1: in place when tracking began (October 6, 2026) · source
- Built-in web search: supported on both.gpt-5: in place when tracking began (October 7, 2026) · source · gpt-5.1: in place when tracking began (October 6, 2026) · source
Not published for gpt-5: PDF input, temperature parameter, top_p parameter, logprobs.
Not published for gpt-5.1: 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-5.1 | Microsoft Foundryversion 2025-11-13 | gpt-5.1 | May 15, 2027Active | 212 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-5togpt-5.1.
Compared from AIWire's published data when this page loaded. Each fact links to the page it came from. Model pages: gpt-5, gpt-5.1.