Update Anthropic · Released
Claude 2.1
What is Claude 2.1?
Claude 2.1 is a Update AI model from Anthropic, released on November 21, 2023. It has a 200K tokens context window, costs $0.00 per million input tokens, and scores 73.1% on MMLU. It is available via the company's API.
Claude 2 update — 200K context and reduced hallucinations
Significant improvements in accuracy and honesty over Claude 2
Key features
- 200K context window
- Reduced hallucination rates
- Enhanced accuracy
- Tool use capabilities
How much does Claude 2.1 cost?
| Metric | Price |
|---|---|
| input | $8/M |
| output | $24/M |
| input per mtok | $0.00 |
| output per mtok | $0.00 |
Pricing data verified .
What context window does Claude 2.1 have?
- Context window
- 200K tokens
- Input modalities
- text
- Output modalities
- text
How does Claude 2.1 score on benchmarks?
| Benchmark | Score |
|---|---|
| MMLU | 73.1% |
| HumanEval | 15.9% |
| MMLU-Pro | 49.5% |
| GPQA Diamond | 31.9% |
| LiveCodeBench | 19.5% |
| MATH-500 | 37.4% |
| AIME 2025 | 3.3% |
| HLE | 4.2% |
| SciCode | 18.4% |
| AA Intelligence Index | 9.3 |
Benchmark scores verified .
What's new
- 200K context (2× Claude 2)
- 50% fewer hallucinations
- Tool use beta
How does Claude 2.1 compare to Claude 2?
- HumanEval: 71.2% → 15.9% (-55.3pt)
- Context window: 100K tokens → 200K tokens