Frontier history
When models joined and left the leaderboard's value frontier, how many frontier rows each published day file holds, and what the cheapest model above each score floor cost.
Frontier size per published day
Board now: 12 on the value frontier, the leaderboard this site publishes from the catalogue as of Oct 6, 2026. The 2026-10-06 day file records 12 frontier rows.
Joins and leaves
From the wire, newest first. Each event compares two recorded snapshots, and the wire names them; some of those days are withheld from publication, so an event can fall between two published day files. A model joins or leaves when the board changes around it, or when its own score or price moves. For a model priced by time of day, the recorded price is the window in force when the feed was read, so its events are marked: they can be the hour of the read, not a move.
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Changes dated 2026-10-06 are measured against the 2026-09-30 day file, which is kept as that morning's release published it (03:34 UTC). A later release the same day (16:45 UTC) had already shown some of them: 9 of the 12 frontier moves dated 2026-10-06 were on the site from that release. One change since that release has no event here: Gemma 4 26B A4B is on the frontier again.
- Joined Anthropic: Claude Opus 5.5 joined the frontier
- Joined DeepSeek: DeepSeek V4.1 Flash joined the frontier
- Joined DeepSeek: DeepSeek V4 Flash 0423 joined the frontier (restatement, §96)
- Joined Meta: Llama 3.1 8B Instruct joined the frontier (restatement, §96)
- Joined Xiaomi: MiMo-V2.6-Flash joined the frontier
- Joined Xiaomi: MiMo-V2.6-Pro joined the frontier
- Left Anthropic: Claude Fable 5.1 left the frontier
- Left Anthropic: Claude Opus 5 left the frontier
- Left Google: Gemma 4 31B left the frontier (restatement, §96)
- Left Qwen: Qwen3 30B A3B Instruct 2507 left the frontier
- Left Qwen: Qwen3.5-Flash left the frontier
- Left Tencent: Hy3 left the frontier (restatement, §83) a time-of-day price; see §82
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- Joined Tencent: Hy3 joined the frontier a time-of-day price; see §82
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- Joined DeepSeek: DeepSeek V4 Flash 0423 joined the frontier
- Joined Qwen: Qwen3 30B A3B Instruct 2507 joined the frontier
- Left Tencent: Hy3 left the frontier a time-of-day price; see §82
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- Joined Anthropic: Claude Fable 5.1 joined the frontier
- Joined Google: Gemini 3.8 Flash joined the frontier
- Joined Google: Gemma 3 4B joined the frontier
- Joined OpenAI: gpt-oss-120b joined the frontier
- Joined OpenAI: gpt-oss-20b joined the frontier
- Joined Z.ai: GLM 5.3 Flash joined the frontier
- Left DeepSeek: DeepSeek V4 Flash 0423 left the frontier
- Left Google: Gemini 3.7 Flash left the frontier
- Left Qwen: Qwen3 30B A3B Instruct 2507 left the frontier
- Left Upstage: Solar Pro 4 left the frontier
- Left Xiaomi: MiMo-V2.5-Pro left the frontier
- Left Z.ai: GLM 5.2 left the frontier
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- Joined Tencent: Hy3 joined the frontier a time-of-day price; see §82
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- Joined Z.ai: GLM 5.2 joined the frontier
- Left Tencent: Hy3 left the frontier a time-of-day price; see §82
The price-at-floor table below is a separate published series, price-at-floor.json, not a reading of the published day files. It takes one point from every day file the pipeline recorded: 18 dates from 2026-08-24 to 2026-10-06, of which 4 are published day files, 13 are withheld, and 1 (2026-09-19) is in neither list of the manifest. For each floor it publishes only the cheapest standard-delivery model, its balanced price and its score. Its last point is priced at the reference price; the earlier points are OpenRouter’s model-level price, which the site published before that rule (§96).