# Claude Instant 1.2

Claude Instant 1.2 is an AI model released by Anthropic on Aug 9 2023. It has a 100k context window.

## Facts

| Field | Value |
| --- | --- |
| Model | Claude Instant 1.2 |
| Developer | Anthropic |
| Release date | Wednesday, Aug 9 2023 |
| Licensing | Closed |
| Context window | 100k |

## Tracked benchmark scores

| Benchmark | Score | Source | What it measures |
| --- | --- | --- | --- |
| HumanEval | 58.7% | Lab | 164 small Python problems: the AI is given a function's description and has to write the working function. This was the coding benchmark of the GPT-3.5 and GPT-4 era, before the field moved to fixing real bugs in real repositories. Higher is better. |
| GSM8K | 86.7% | Lab | Grade-school maths word problems that take a few steps of arithmetic to work through. It separated the models of 2022 and 2023 sharply, then saturated. One caveat on the historical numbers: OpenAI included part of the GSM8K training set in GPT-4's pre-training mix, so GPT-4's score is not a clean few-shot result. Higher is better. |

## About Claude Instant 1.2

Claude Instant 1.2, released August 9, 2023, updated Anthropic's faster, lower-cost model line while Claude 2 occupied the higher-capability tier. It supported a 100,000-token context window and was aimed at applications where response speed and operating cost mattered, including conversational services and processing long documents. It was a separate model option rather than a new name for Claude 2.

Anthropic reported improvements in mathematics, coding, formatting and instruction following over Instant 1.1. HumanEval rose from 52.8% to 58.7%, while GSM8K rose from 80.9% to 86.7% in its evaluations. The company also described fewer hallucinations and better resistance to jailbreak attempts. Those gains illustrate the role of the Instant line: bringing selected improvements to a lighter model that developers could use for more frequent requests.

## Questions and answers

### When was Claude Instant 1.2 released?

Claude Instant 1.2 was released by Anthropic on Wednesday, Aug 9 2023.

### Who made Claude Instant 1.2?

Claude Instant 1.2 was built by Anthropic. AI safety company building the Claude family of models. Founded in 2021 by former OpenAI researchers.

### What benchmark scores did Claude Instant 1.2 get?

Claude Instant 1.2 reports 2 tracked benchmark scores — HumanEval: 58.7%; GSM8K: 86.7%. Tracked scores may come from lab reports or independent benchmarks; source details accompany the benchmark data.

### What is the context window of Claude Instant 1.2?

Claude Instant 1.2 has a context window of 100k. Providers may specify separate input and output token limits.

### Is Claude Instant 1.2 open source?

No. Claude Instant 1.2 is a closed model. The weights are not published — it is available only through the provider's own API, apps, or partner platforms.

### What came before and after Claude Instant 1.2?

Anthropic's previous tracked release was Claude 2 on Jul 11 2023, 29 days earlier. It was followed by Claude 2.1 on Nov 21 2023.


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Canonical page: https://aireleasetracker.com/model/anthropic/claude-instant-1.2
Site index: https://aireleasetracker.com/llms.txt
Source: AI Release Tracker (https://aireleasetracker.com). Most benchmark scores come from lab launch material; gathered results identify the leaderboard that published them.