Reference 2026-04-15 05:55 UTC to 2026-04-23 05:56 UTC

6059 6059 

6060 Used by OpenAI to cache responses for similar requests to optimize your cache hit rates. Replaces the `user` field. [Learn more](/docs/guides/prompt-caching).6060 Used by OpenAI to cache responses for similar requests to optimize your cache hit rates. Replaces the `user` field. [Learn more](/docs/guides/prompt-caching).

6061 6061 

6062 - `prompt_cache_retention: optional "in-memory" or "24h"`6062 - `prompt_cache_retention: optional "in_memory" or "24h"`

6063 6063 

6064 The retention policy for the prompt cache. Set to `24h` to enable extended prompt caching, which keeps cached prefixes active for longer, up to a maximum of 24 hours. [Learn more](/docs/guides/prompt-caching#prompt-cache-retention).6064 The retention policy for the prompt cache. Set to `24h` to enable extended prompt caching, which keeps cached prefixes active for longer, up to a maximum of 24 hours. [Learn more](/docs/guides/prompt-caching#prompt-cache-retention).

6065 6065 

6066 - `"in-memory"`6066 - `"in_memory"`

6067 6067 

6068 - `"24h"`6068 - `"24h"`

6069 6069 

6423 "version": "version"6423 "version": "version"

6424 },6424 },

6425 "prompt_cache_key": "prompt-cache-key-1234",6425 "prompt_cache_key": "prompt-cache-key-1234",

6426 "prompt_cache_retention": "in-memory",6426 "prompt_cache_retention": "in_memory",

6427 "reasoning": {6427 "reasoning": {

6428 "effort": "none",6428 "effort": "none",

6429 "generate_summary": "auto",6429 "generate_summary": "auto",

3164 3164 

3165 Used by OpenAI to cache responses for similar requests to optimize your cache hit rates. Replaces the `user` field. [Learn more](/docs/guides/prompt-caching).3165 Used by OpenAI to cache responses for similar requests to optimize your cache hit rates. Replaces the `user` field. [Learn more](/docs/guides/prompt-caching).

3166 3166 

3167- `prompt_cache_retention: optional "in-memory" or "24h"`3167- `prompt_cache_retention: optional "in_memory" or "24h"`

3168 3168 

3169 The retention policy for the prompt cache. Set to `24h` to enable extended prompt caching, which keeps cached prefixes active for longer, up to a maximum of 24 hours. [Learn more](/docs/guides/prompt-caching#prompt-cache-retention).3169 The retention policy for the prompt cache. Set to `24h` to enable extended prompt caching, which keeps cached prefixes active for longer, up to a maximum of 24 hours. [Learn more](/docs/guides/prompt-caching#prompt-cache-retention).

3170 3170 

3171 - `"in-memory"`3171 - `"in_memory"`

3172 3172 

3173 - `"24h"`3173 - `"24h"`

3174 3174 

10364 10364 

10365 Used by OpenAI to cache responses for similar requests to optimize your cache hit rates. Replaces the `user` field. [Learn more](/docs/guides/prompt-caching).10365 Used by OpenAI to cache responses for similar requests to optimize your cache hit rates. Replaces the `user` field. [Learn more](/docs/guides/prompt-caching).

10366 10366 

10367 - `prompt_cache_retention: optional "in-memory" or "24h"`10367 - `prompt_cache_retention: optional "in_memory" or "24h"`

10368 10368 

10369 The retention policy for the prompt cache. Set to `24h` to enable extended prompt caching, which keeps cached prefixes active for longer, up to a maximum of 24 hours. [Learn more](/docs/guides/prompt-caching#prompt-cache-retention).10369 The retention policy for the prompt cache. Set to `24h` to enable extended prompt caching, which keeps cached prefixes active for longer, up to a maximum of 24 hours. [Learn more](/docs/guides/prompt-caching#prompt-cache-retention).

10370 10370 

10371 - `"in-memory"`10371 - `"in_memory"`

10372 10372 

10373 - `"24h"`10373 - `"24h"`

10374 10374 

10736 "version": "version"10736 "version": "version"

10737 },10737 },

10738 "prompt_cache_key": "prompt-cache-key-1234",10738 "prompt_cache_key": "prompt-cache-key-1234",

10739 "prompt_cache_retention": "in-memory",10739 "prompt_cache_retention": "in_memory",

10740 "reasoning": {10740 "reasoning": {

10741 "effort": "none",10741 "effort": "none",

10742 "generate_summary": "auto",10742 "generate_summary": "auto",

6103 6103 

6104 Used by OpenAI to cache responses for similar requests to optimize your cache hit rates. Replaces the `user` field. [Learn more](/docs/guides/prompt-caching).6104 Used by OpenAI to cache responses for similar requests to optimize your cache hit rates. Replaces the `user` field. [Learn more](/docs/guides/prompt-caching).

6105 6105 

6106 - `prompt_cache_retention: optional "in-memory" or "24h"`6106 - `prompt_cache_retention: optional "in_memory" or "24h"`

6107 6107 

6108 The retention policy for the prompt cache. Set to `24h` to enable extended prompt caching, which keeps cached prefixes active for longer, up to a maximum of 24 hours. [Learn more](/docs/guides/prompt-caching#prompt-cache-retention).6108 The retention policy for the prompt cache. Set to `24h` to enable extended prompt caching, which keeps cached prefixes active for longer, up to a maximum of 24 hours. [Learn more](/docs/guides/prompt-caching#prompt-cache-retention).

6109 6109 

6110 - `"in-memory"`6110 - `"in_memory"`

6111 6111 

6112 - `"24h"`6112 - `"24h"`

6113 6113 

6466 "version": "version"6466 "version": "version"

6467 },6467 },

6468 "prompt_cache_key": "prompt-cache-key-1234",6468 "prompt_cache_key": "prompt-cache-key-1234",

6469 "prompt_cache_retention": "in-memory",6469 "prompt_cache_retention": "in_memory",

6470 "reasoning": {6470 "reasoning": {

6471 "effort": "none",6471 "effort": "none",

6472 "generate_summary": "auto",6472 "generate_summary": "auto",