Model Library
AnthropicReleased September 29, 2025Claude 4.5 Sonnet
Anthropic · Released September 29, 2025
Intelligence score
29
At a glance
- Intelligence
- 29
- Speed
- 46.6tokens/sec
- Latency
- 1.54stime to first token
- Input price
- $3.00per 1M tokens
- Output price
- $15.00per 1M tokens
- Context window
- 5tokens
- Parameters
- —
Summary
Comparison summary
Claude 4.5 Sonnet (Non-reasoning) scores 29 (estimated) on the Artificial Analysis Intelligence Index, placing it well above average among other non-reasoning models in a similar price tier (median: 17). Claude 4.5 Sonnet (Non-reasoning) generates output at 46.6 tokens per second (based on Anthropic's API), which is at the lower end compared to other non-reasoning models in a similar price tier (median: 64.2 t/s). Claude 4.5 Sonnet (Non-reasoning) costs $3.00 per 1M input tokens (somewhat higher than average, median: $1.88) and $15.00 per 1M output tokens (somewhat higher than average, median: $7.75), based on Anthropic's API.
Specifications
Technical specifications
| Model name | Claude 4.5 Sonnet |
|---|---|
| Provider | Anthropic |
| Release date | September 29, 2025 |
| Intelligence score | 29 |
| Speed | 46.6 tokens/sec |
| Latency (TTFT) | 1.54s |
| Input price | $3.00 / 1M tokens |
| Output price | $15.00 / 1M tokens |
| Context window | 5 tokens |
| Parameters | — |
| Reasoning | No |
| Input modalities | text, image |
| Output modalities | — |
| Open weights | No |
| License | — |
| API availability | — |
| Source | Model Intelligence legacy profile: claude-4-5-sonnet |
Pricing
Token prices
Price per 1M tokens
Claude 4.5 Sonnet, as listed in the catalog record
- Input$3.00
- Output$15.00
| Token type | Price per 1M |
|---|---|
| Input | $3.00 |
| Output | $15.00 |
Model Intelligence legacy profile: claude-4-5-sonnet
FAQ · 19
Frequently asked questions
Claude 4.5 Sonnet (Non-reasoning) was released on September 29, 2025.
Claude 4.5 Sonnet (Non-reasoning) was created by Anthropic.
Claude 4.5 Sonnet (Non-reasoning) scores 29 (estimated) on the Artificial Analysis Intelligence Index, placing it well above average among other non-reasoning models in a similar price tier (median: 17).
Claude 4.5 Sonnet (Non-reasoning) generates output at 46.6 tokens per second (based on Anthropic's API), which is at the lower end compared to other non-reasoning models in a similar price tier (median: 64.2 t/s).
Claude 4.5 Sonnet (Non-reasoning) has a time to first token (TTFT) of 1.54s (based on Anthropic's API), which is better than average compared to other non-reasoning models in a similar price tier (median: 1.56s).
Claude 4.5 Sonnet (Non-reasoning) costs $3.00 per 1M input tokens (somewhat higher than average, median: $1.88) and $15.00 per 1M output tokens (somewhat higher than average, median: $7.75), based on Anthropic's API.
Claude 4.5 Sonnet (Non-reasoning) costs $3.00 per 1M input tokens and $15.00 per 1M output tokens (based on Anthropic's API). For a blended rate (7:2:1 cache hit/input/output ratio), this is $2.31 per 1M tokens. Pricing may vary by provider.
No, Claude 4.5 Sonnet (Non-reasoning) is not a reasoning model. It provides direct responses without extended chain-of-thought reasoning.
Claude 4.5 Sonnet (Non-reasoning) supports text and image input.
Claude 4.5 Sonnet (Non-reasoning) supports text output.
Yes, Claude 4.5 Sonnet (Non-reasoning) supports image input and can analyze, describe, and answer questions about images.
Yes, Claude 4.5 Sonnet (Non-reasoning) is multimodal. It can process text and image input and generate text output.
Claude 4.5 Sonnet (Non-reasoning) has a context window of 1.0M tokens. This determines how much text and conversation history the model can process in a single request.
No, Claude 4.5 Sonnet (Non-reasoning) is proprietary. The model weights are not publicly available.
Claude 4.5 Sonnet (Non-reasoning) is a proprietary model and Anthropic has not disclosed the model size or parameter count.
Claude 4.5 Sonnet (Non-reasoning) achieves a score of 29 on the Artificial Analysis Intelligence Index. This composite benchmark evaluates models across reasoning, knowledge, mathematics, and coding.
Claude 4.5 Sonnet (Non-reasoning) has a knowledge cutoff of July 2025. The model's training data includes information up to this date.
Yes, Claude 4.5 Sonnet (Non-reasoning) is available via API through 5 providers.
Claude 4.5 Sonnet (Non-reasoning) is available through 5 API providers.