// Anthropic
Claude Opus 4.1
A Anthropic model. 1 prices across 1 channels side by side, each with its source and check date – plus specs, licence, speed and benchmarks.
- Official in/out per 1M
- $15 / $75
- Lowest (official)
- $15 / $75
- Context
- 200K
- Prices listed
- 1
Prices checked 2026-10-10Official sources linked on every rowNo estimatesCheapest LLM APIs →
01Specs at a glance
Official values first; gaps filled from OpenRouter’s API where the vendor page is silent.
| Vendor | Anthropic |
|---|---|
| Context window | 200K (200,000 tokens) |
| Max output | 32K |
| Input | Image · Text · File/PDF |
| Output | Text |
| Tool calling / JSON | Yes / No |
| Weights & licence | Closed · Proprietary (API only) |
| Released | Aug 5, 2025 (OpenRouter listing date) |
| Model IDs | claude-opus-4-1 |
02Prices on 1 channels
Per 1M tokens, in the currency each source publishes (1 USD = 6.7 CNY for the blended column). Sorted: official first, then cheapest.
| Channel | Source | Input | Output | Cache hit | Blended $ | Context | Notes |
|---|---|---|---|---|---|---|---|
| Official Vendor API, billed in USD | Official 10-10 | $15 | $75 | $1.5 | 30 | 200K | Batch −50%Batch -50%; cache write 5m=1.25x input, 1h=2x input |
“Official” = vendor pricing page; “Platform” = the platform’s own pricing page; “OpenRouter” = price listed on OpenRouter, not checked on the platform’s site. Click a source tag to open the original page.
03Where you can use it
Derived only from the price sources above. Country restrictions are set by each vendor – check their terms before you sign up.
- Vendor API, billed in USD
Official
04Performance
All results →Speed and AA index from Artificial Analysis public leaderboards (not our own tests); benchmark scores from our benchmark library, best result per benchmark.
| Benchmark | Best score | Source | Date |
|---|---|---|---|
| LMArena Text | 1450 | official | 2026-10-08 |
| LMArena WebDev | 1390 | official | 2026-10-08 |
| GPQA Diamond | 76.8% | independent | 2025-08-05 |
| SWE-bench Verified | 73.3% | independent | 2026-02-11 |
| AIME (OTIS Mock AIME 2024–2025) | 68.9% | independent | 2025-08-05 |
| Humanity's Last Exam | 11.5% | compiled | 2025-08-05 |
| τ²-bench | 82.4% | vendor | 2025-08-05 |
| Terminal-Bench 2.0 | 38.0% | official | 2025-10-31 |
05Price changes we recorded
All price changes →From our daily re-checks of the sources above.
No price change recorded since we started tracking (2026-10-10).
06More from Anthropic
FAQ
How much does the Claude Opus 4.1 API cost?
On the official pricing page: $15 / $75 per 1M input / output tokens, cached input $1.5 (checked 2026-10-10).
What is the context window of Claude Opus 4.1?
200K tokens of context, up to 32K output tokens. Platforms may cap it lower – see the table.
Is Claude Opus 4.1 open source?
No. It is only available through APIs and the vendor’s apps.