29 dated · 29 model families in the current roster
AI model releases over time
A release-date view of the model families in Spring Prompt's current business-skills evaluation roster, including cadence by model line and provider.
Release history, not a leaderboard. This page intentionally contains no unpublished benchmark score, rank, verdict, or claim that newer means better.
Release history by provider
Every model, by age
| Model | Released ▾ | Provider | Date source |
|---|---|---|---|
| GPT-5.6 LunaOpenAI | 1 month ago(2026-07-09) | OpenAI | OpenRouter model availability |
| GPT-5.6 SolOpenAI | 1 month ago(2026-07-09) | OpenAI | OpenRouter model availability |
| GPT-5.6 TerraOpenAI | 1 month ago(2026-07-09) | OpenAI | OpenRouter model availability |
| Grok 4.5xAI | 2 months ago(2026-07-08) | xAI | OpenRouter model availability |
| Kimi K2.7 CodeMoonshot AI | 2 months ago(2026-06-12) | Moonshot AI | OpenRouter model availability |
| Claude Fable 5Anthropic | 2 months ago(2026-06-09) | Anthropic | OpenRouter model availability |
| Claude Opus 4.8Anthropic | 3 months ago(2026-05-27) | Anthropic | OpenRouter model availability |
| Qwen3.7 MaxAlibaba | 3 months ago(2026-05-21) | Alibaba | OpenRouter model availability |
| Gemini 3.5 FlashGoogle | 3 months ago(2026-05-19) | OpenRouter model availability | |
| Gemini 3.1 Flash LiteGoogle | 4 months ago(2026-05-07) | OpenRouter model availability | |
| GPT-5.5OpenAI | 4 months ago(2026-04-24) | OpenAI | OpenRouter model availability |
| Grok 4.20xAI | 5 months ago(2026-03-31) | xAI | OpenRouter model availability |
| MiniMax M2.7MiniMax | 5 months ago(2026-03-18) | MiniMax | OpenRouter model availability |
| GPT-5.4 MiniOpenAI | 5 months ago(2026-03-17) | OpenAI | OpenRouter model availability |
| GPT-5.4OpenAI | 6 months ago(2026-03-05) | OpenAI | OpenRouter model availability |
| Gemini 3.1 Pro PreviewGoogle | 6 months ago(2026-02-19) | OpenRouter model availability | |
| Claude Sonnet 4.6Anthropic | 6 months ago(2026-02-17) | Anthropic | OpenRouter model availability |
| Qwen3.5 Plus 2026-02-15Alibaba | 6 months ago(2026-02-16) | Alibaba | OpenRouter model availability |
| GLM 5Z.ai | 6 months ago(2026-02-11) | Z.ai | OpenRouter model availability |
| Claude Opus 4.6Anthropic | 7 months ago(2026-02-04) | Anthropic | OpenRouter model availability |
| Kimi K2.5Moonshot AI | 7 months ago(2026-01-27) | Moonshot AI | OpenRouter model availability |
| Gemini 3 Flash PreviewGoogle | 8 months ago(2025-12-17) | OpenRouter model availability | |
| DeepSeek V3.2DeepSeek | 9 months ago(2025-12-01) | DeepSeek | OpenRouter model availability |
| Claude Opus 4.5Anthropic | 9 months ago(2025-11-24) | Anthropic | OpenRouter model availability |
| Claude Haiku 4.5Anthropic | 10 months ago(2025-10-15) | Anthropic | OpenRouter model availability |
| Claude Sonnet 4.5Anthropic | 11 months ago(2025-09-29) | Anthropic | OpenRouter model availability |
| DeepSeek V3.1 TerminusDeepSeek | 11 months ago(2025-09-22) | DeepSeek | OpenRouter model availability |
| Mistral Medium 3.1Mistral | 1.0 years ago(2025-08-13) | Mistral | OpenRouter model availability |
| GPT-5 MiniOpenAI | 1.0 years ago(2025-08-07) | OpenAI | OpenRouter model availability |
Catalogue dates are model-availability dates populated from OpenRouter. When that field is missing, a reviewed Artificial Analysis model reference page may supply the date. Unknown dates stay unknown rather than being inferred.
Release cadence, line by line
When each model line last shipped and how often new versions land — Opus vs. Sonnet, Gemini Pro vs. Flash, GPT mainline vs. mini. Hover a line's history for every release we track.
| Model line | Latest release | How long ago | Typical gap | Releases tracked |
|---|---|---|---|---|
| GPT (mainline)OpenAI | GPT-5.6 Terra | 1 month ago 2026-07-09 |
~76 days | 5 |
| GrokxAI | Grok 4.5 | 2 months ago 2026-07-08 |
~99 days | 2 |
| KimiMoonshotAI | Kimi K2.7 Code | 2 months ago 2026-06-12 |
~136 days | 2 |
| Claude OpusAnthropic | Claude Opus 4.8 | 3 months ago 2026-05-27 |
~112 days | 3 |
| QwenQwen | Qwen3.7 Max | 3 months ago 2026-05-21 |
~94 days | 2 |
| Gemini FlashGoogle | Gemini 3.5 Flash | 3 months ago 2026-05-19 |
~141 days | 3 |
| GPT mini / nanoOpenAI | GPT-5.4 Mini | 5 months ago 2026-03-17 |
~222 days | 2 |
| Gemini ProGoogle | Gemini 3.1 Pro Preview | 6 months ago 2026-02-19 |
— | 1 |
| Claude SonnetAnthropic | Claude Sonnet 4.6 | 6 months ago 2026-02-17 |
~141 days | 2 |
| GLMZ.ai | GLM 5 | 6 months ago 2026-02-11 |
— | 1 |
| DeepSeekDeepSeek | DeepSeek V3.2 | 9 months ago 2025-12-01 |
~70 days | 2 |
| Claude HaikuAnthropic | Claude Haiku 4.5 | 10 months ago 2025-10-15 |
— | 1 |
Every version bump counts as a release. Cadence is computed only from the current evaluation roster, so lines may skip releases outside it; “typical gap” is the median days between consecutive dated roster releases. We do not turn that limited history into a release forecast.
Release habits by lab
Within the dated models in our current roster: how often releases landed, and the most common release weekday in this limited sample.
OpenAI
- Releases tracked: 7
- Typical gap: ~76 days
- Favourite day: Thursday (5 of 7)
- Latest: GPT-5.6 Terra 1 month ago
Anthropic
- Releases tracked: 7
- Typical gap: ~40 days
- Favourite day: Wednesday (3 of 7)
- Latest: Claude Fable 5 2 months ago
- Releases tracked: 4
- Typical gap: ~64 days
- Favourite day: Thursday (2 of 4)
- Latest: Gemini 3.5 Flash 3 months ago
Frequently asked
When did OpenAI last release a GPT (mainline) model in this roster?
GPT-5.6 Terra is the most recent GPT (mainline) release in Spring Prompt's current evaluation roster, released 1 month ago (2026-07-09).
How often has OpenAI released GPT (mainline) models in this roster?
Across the 5 dated GPT (mainline) models in the current evaluation roster, the median gap is about 76 days. This is a description of the roster, not a release forecast.
When did xAI last release a Grok model in this roster?
Grok 4.5 is the most recent Grok release in Spring Prompt's current evaluation roster, released 2 months ago (2026-07-08).
When did MoonshotAI last release a Kimi model in this roster?
Kimi K2.7 Code is the most recent Kimi release in Spring Prompt's current evaluation roster, released 2 months ago (2026-06-12).
When did Anthropic last release a Claude Opus model in this roster?
Claude Opus 4.8 is the most recent Claude Opus release in Spring Prompt's current evaluation roster, released 3 months ago (2026-05-27).
How often has Anthropic released Claude Opus models in this roster?
Across the 3 dated Claude Opus models in the current evaluation roster, the median gap is about 112 days. This is a description of the roster, not a release forecast.
When did Qwen last release a Qwen model in this roster?
Qwen3.7 Max is the most recent Qwen release in Spring Prompt's current evaluation roster, released 3 months ago (2026-05-21).
When did Google last release a Gemini Flash model in this roster?
Gemini 3.5 Flash is the most recent Gemini Flash release in Spring Prompt's current evaluation roster, released 3 months ago (2026-05-19).
How often has Google released Gemini Flash models in this roster?
Across the 3 dated Gemini Flash models in the current evaluation roster, the median gap is about 141 days. This is a description of the roster, not a release forecast.
Continue exploring
Open a model’s evidence profile
Release recency is context, not capability. Use the model profiles to inspect source-specific benchmark records, configurations, and operational facts without turning age into a ranking.