https://dl.google.com/dl/edgedl/chromeos/recovery/recovery.json shows:
{
    "channel": "stable-channel",
    "desc": "",
    "file": "chromeos_9592.96.0_asuka_recovery_stable-channel_mp.bin",
    "filesize": 2275377152,
    "hwidmatch": "^ASUKA .*",
    "manufacturer": "Dell",
    "md5": "d5b44c2a39315d2e757d946dbd8b62e7",
    "model": "Dell Chromebook 13 3380",
    "name": "Dell Chromebook 13 3380",
    "photourl": "",
    "sha1": "0edf3746c948d772ccdca26d000e19cd539e3c03",
    "sku": "",
    "url": "https://dl.google.com/dl/edgedl/chromeos/recovery/chromeos_9592.96.0_asuka_recovery_stable-channel_mp.bin.zip",
    "version": "9592.96.0",
    "zipfilesize": 1171977257,
    "hwids": []
  },
  {
    "channel": "stable-channel",
    "desc": "",
    "file": "chromeos_9460.60.0_auron-paine_recovery_stable-channel_paine-mp-v2.bin",
    "filesize": 2275377152,
    "hwidmatch": "^PAINE .*",
    "manufacturer": "Acer",
    "md5": "3e974d7df8569fb7480f22d348cc3bc9",
    "model": "Acer Chromebook 11 (C740)",
    "name": "Acer Chromebook 11 (C740)",
    "photourl": "",
    "sha1": "d25b0c7303a26059832a01a388119eba55dbddc8",
    "sku": "",
    "url": "https://dl.google.com/dl/edgedl/chromeos/recovery/chromeos_9460.60.0_auron-paine_recovery_stable-channel_paine-mp-v2.bin.zip",
    "version": "9460.60.0",
    "zipfilesize": 1085685180,
    "hwids": []
  },
.....


recovery.json should be updated with latest stable releases builds.