Migrating from gpt-5-codex to gpt-5.6-sol
What changes when you move from gpt-5-codex to gpt-5.6-sol: context window 400,000 → 1,050,000 tokens.
- From
- gpt-5-codex
- Status
- Retired
- Shutdown
- Jul 23, 2026
- Time left
- —
- Status
- Active
- Shutdown
- none announced
- Time left
- —
Prices
USD per 1M tokens, standard tier| Type | gpt-5-codex | gpt-5.6-sol | Change |
|---|---|---|---|
| Input | Not published | $4.00first seen October 1, 2026 · source | — |
| Cached input | Not published | $0.40first seen October 1, 2026 · source | — |
| Output | Not published | $20.00first seen October 1, 2026 · source | — |
Other tiers, prompt-size bands and modalities are on each model's page.
Limits
Tokens| Limit | gpt-5-codex | gpt-5.6-sol | Change |
|---|---|---|---|
| Context window | 400,000 tokensin place when tracking began (October 6, 2026) · source | 1,050,000 tokensin place when tracking began (October 7, 2026) · source | +162.5% |
| Max output tokens | 128,000 tokensin place when tracking began (October 6, 2026) · source | 128,000 tokensin place when tracking began (October 7, 2026) · source | 0% |
Features and parameters
Compare models- Batch API: not supported on gpt-5-codex, supported on gpt-5.6-sol.gpt-5-codex: in place when tracking began (October 6, 2026) · source · gpt-5.6-sol: in place when tracking began (October 7, 2026) · source
Same on both
- Structured outputs: supported on both.gpt-5-codex: in place when tracking began (October 6, 2026) · source · gpt-5.6-sol: in place when tracking began (October 7, 2026) · source
- Function calling: supported on both.gpt-5-codex: in place when tracking began (October 6, 2026) · source · gpt-5.6-sol: in place when tracking began (October 7, 2026) · source
- Prompt caching: supported on both.gpt-5-codex: in place when tracking began (October 6, 2026) · source · gpt-5.6-sol: in place when tracking began (October 7, 2026) · source
- Image input: supported on both.gpt-5-codex: in place when tracking began (October 6, 2026) · source · gpt-5.6-sol: in place when tracking began (October 7, 2026) · source
- Reasoning / thinking: supported on both.gpt-5-codex: in place when tracking began (October 6, 2026) · source · gpt-5.6-sol: in place when tracking began (October 7, 2026) · source
- Fine-tuning: not supported on both.gpt-5-codex: in place when tracking began (October 6, 2026) · source · gpt-5.6-sol: in place when tracking began (October 7, 2026) · source
- Built-in web search: supported on both.gpt-5-codex: in place when tracking began (October 6, 2026) · source · gpt-5.6-sol: in place when tracking began (October 7, 2026) · source
Not published for gpt-5-codex: PDF input, temperature parameter, top_p parameter, logprobs.
Not published for gpt-5.6-sol: PDF input, temperature parameter, top_p parameter, logprobs.
Free tier
gpt-5-codex: no free tier listed
gpt-5.6-sol: Free for shared data, 1M tokens a day for Launch and Grow (250K for Build), in place when tracking began (October 12, 2026) (source) · All free models
gpt-5.6-sol adds a free tier.
Aliases
All aliasesNo aliases point at gpt-5-codex.
Aliases pointing at gpt-5.6-sol: gpt-daybreak-blue-latest (in place when tracking began (October 7, 2026) · source)
On cloud platforms
All platform dates| Model | Platform | Platform ID | Shutdown | Time left |
|---|---|---|---|---|
| gpt-5-codex | Microsoft Foundryversion 2025-09-15 | gpt-5-codex | Mar 17, 2027Active | 153 days |
| gpt-5.6-sol | Amazon Bedrock | openai.gpt-5.6-sol | not before Jul 13, 2027Active | |
| gpt-5.6-sol | Microsoft Foundryversion 2026-07-09 | gpt-5.6-sol | Jan 11, 2028Active | 453 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-codextogpt-5.6-sol.
Compared from AIWire's published data when this page loaded. Each fact links to the page it came from. Model pages: gpt-5-codex, gpt-5.6-sol.