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Migrating from gpt-5-pro to gpt-5.6-sol

What changes when you move from gpt-5-pro to gpt-5.6-sol: input price −73.3%, output price −83.3%, context window 400,000 → 1,050,000 tokens.

From
gpt-5-pro
Status
Deprecated
Shutdown
Dec 11, 2026
Time left
48 days
To
gpt-5.6-sol
Status
Active
Shutdown
none announced
Time left
—

Prices

USD per 1M tokens, standard tier
Typegpt-5-progpt-5.6-solChange
Input$15.00first seen October 1, 2026 · source$4.00first seen October 1, 2026 · source−73.3%
Cached inputNot published$0.40first seen October 1, 2026 · source—
Output$120.00first seen October 1, 2026 · source$20.00first seen October 1, 2026 · source−83.3%

At 1M input and 250K output tokens a month: $45.00 on gpt-5-pro, $9.00 on gpt-5.6-sol (−80%).

Other tiers, prompt-size bands and modalities are on each model's page.

Limits

Tokens
Limitgpt-5-progpt-5.6-solChange
Context window400,000 tokensin place when tracking began (October 6, 2026) · source1,050,000 tokensin place when tracking began (October 7, 2026) · source+162.5%
Max output tokens272,000 tokensin place when tracking began (October 6, 2026) · source128,000 tokensin place when tracking began (October 7, 2026) · source−52.9%

Features and parameters

Compare models

Same on both

  • Structured outputs: supported on both.gpt-5-pro: 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-pro: in place when tracking began (October 6, 2026) · source · gpt-5.6-sol: in place when tracking began (October 7, 2026) · source
  • Batch API: supported on both.gpt-5-pro: 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-pro: 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-pro: 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-pro: 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-pro: 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-pro: Prompt caching, 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-pro: 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 aliases

No aliases point at gpt-5-pro.

Aliases pointing at gpt-5.6-sol: gpt-daybreak-blue-latest (in place when tracking began on October 7, 2026 · source)

On cloud platforms

All platform dates
ModelPlatformPlatform IDShutdownTime left
gpt-5.6-solAmazon Bedrockopenai.gpt-5.6-solnot before Jul 13, 2027Active
gpt-5.6-solMicrosoft Foundryversion 2026-07-09gpt-5.6-solJan 11, 2028Active444 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

  1. Change the model string from gpt-5-pro to gpt-5.6-sol.
  2. Check max_tokens: gpt-5.6-sol returns at most 128,000 tokens, gpt-5-pro up to 272,000 tokens.

Time until shutdown

gpt-5-pro
48days
00hours
26min
14sec

Counting to 7:00 pm ET on December 10, 2026, which is 00:00 UTC on December 11, 2026.

Compared from AIWire's published data when this page loaded. Each fact links to the page it came from. Model pages: gpt-5-pro, gpt-5.6-sol.