Canonical change record

OpenAI cuts GPT-5.6 Sol API pricing on August 21

OpenAI cut GPT-5.6 Sol API pricing to $4 per million input tokens and $20 per million output tokens on August 21, 2026; OpenAI says the promotional rate…

Operational breakageCost changeActiveRevision 1
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Operational consequence

Admission State
admitted
Breakage Mode
Cost change
Consequence
No code migration is required solely for the price change, but cost alerts, forecasts and routing thresholds may need adjustment.
Lifecycle
active
Materiality
high
Record Class
Operational breakage

Affected subjects

Holds
  • Code
    Subject scope needs review
    Reason
    Account, service-tier, batch, cached-input, tax, and regional eligibility remain explicit exclusions.
Subjects
  • Entity Id
    openai:model:gpt-5.6-sol
    Exclusions
    • cached input
    • batch pricing
    • taxes
    • regional processing
    Identifiers
    • gpt-5.6-sol
    • Input tokens
    • Output tokens
    Regions
    • OpenAI API; pricing eligibility and account terms apply
    Surface
    billing
Detection Technical and lineage detail

Detection

Matcher Holds
  • Code
    Detection needs review
    Reason
    No Kingy billing receipt is retained; the exact price-table dimensions are source-documented only.
Signatures
  • Expected After
    Input Per Million Usd
    4
    Output Per Million Usd
    20
    Expected Before
    Input Per Million Usd
    5
    Output Per Million Usd
    30
    Kind
    Billing metric
    Phase
    verification
    Selector
    gpt-5.6-sol:standard:usd_per_million_tokens
    Source Claim Id
    claim:ksr-openai-gpt-5-6-sol-price-2026-08-21:consequence

Before → after

After
Input Per Million Usd
4
Output Per Million Usd
20
Before
Input Per Million Usd
5
Output Per Million Usd
30

Required action

Action
Refresh cost models and budgets, but keep a post-promotion price assumption because OpenAI guarantees the promotional rate only through at least November 21, 2026.

Next relevant date

Date role
Guaranteed through
Date
Status
Confirmed
Kingy reproduction Technical and lineage detail

Kingy reproduction

Limitations
Audit records source evidence only; no vendor API or paid reproduction test was run.
Status
Not tested
Sources and revision Technical and lineage detail

Sources and revision

Revision
Hash
sha256:ae53b308aa41ba94c4881fedf9918d1e5319b118151396b44cd5536fe2a5b762
Number
1
Correction History
  • Action
    created
    Actor
    gate-d-audit-rehearsal
    Current Hash
    ae53b308aa41ba94c4881fedf9918d1e5319b118151396b44cd5536fe2a5b762
    Reason
    Audited Gate D rewrite rehearsal.
    Recorded At
    2026-08-23T22:57:03.000Z
    Revision
    1