Anthropic Claude Opus 5.5 Pricing on OpenRouter
$4.00 per 1M tokensInput price on OpenRouter, per 1M tokens
$20.00 per 1M tokensOutput price on OpenRouter, per 1M tokens
1,000,000 tokensContext window
128,000 tokensLongest reply (max output)
As listed on OpenRouter; details and sources below.
Directly from Anthropic (official API price): input $4.00 per 1M tokens, output $20.00 per 1M tokens.
OpenRouter lists Anthropic Claude Opus 5.5 at $4.00 per 1M tokens for input and $20.00 per 1M tokens for output. Observed Last checked · Source · Methodology
Amount worked out from the source page: $4.00 per 1M tokens, in USD · as shown in the United States on Oct 18, 2026 · the page does not say whether tax is included; we do not assume it is excluded · no price change seen since Oct 16, 2026.
What typical tasks cost with this model
| Task | At Anthropic's price ($4.00 / $20.00) | Through OpenRouter ($4.00 / $20.00) |
|---|---|---|
| 1,000 chat replies | $10.00 | $10.00 |
| Summarizing 100 documents | $2.44 | $2.44 |
| A day of coding assistant use | $8.00 | $8.00 |
Calculated Prices per 1M tokens (input / output) in brackets; token counts and what is not included: our assumptions and the same tasks on other models.
How we got this number
- What we read: the published price on openrouter.ai/api/v1/models
- Checked: ; tracked since Oct 16, 2026
- Shown in: the United States
- Checks so far: 3 checks since Oct 16, 2026
- What changed: no price change since Oct 16, 2026
- Page updated:
Other measured facts
| Question | Answer | Checked | Status |
|---|---|---|---|
| How much does Anthropic Claude Opus 5.5 cost per 1M output tokens on OpenRouter? | $20.00 per 1M tokens | Observed | |
| How much does Claude Opus 5.5 cost per 1M cache-read tokens (cache hits) directly from Anthropic (official API price)? | $0.20 per 1M tokens | Observed | |
| How much does Claude Opus 5.5 cost per 1M cache-write tokens with a 1-hour cache lifetime directly from Anthropic (official API price)? | $8.00 per 1M tokens | Observed | |
| How much does Claude Opus 5.5 cost per 1M cache-write tokens with a 5-minute cache lifetime directly from Anthropic (official API price)? | $5.00 per 1M tokens | Observed | |
| How much does Claude Opus 5.5 cost per 1M input tokens directly from Anthropic (official API price)? | $4.00 per 1M tokens | Observed | |
| How much does Claude Opus 5.5 cost per 1M output tokens directly from Anthropic (official API price)? | $20.00 per 1M tokens | Observed | |
| What is the context window of Anthropic Claude Opus 5.5 on OpenRouter, in tokens? | 1,000,000 tokens | Observed | |
| What is the maximum output length of Anthropic Claude Opus 5.5 on OpenRouter, in tokens? | 128,000 tokens | Observed |
History
Same price in all 3 checks since Oct 16, 2026.
Marketplace price over the 7 days to Oct 18, 2026: $4.00 per 1M tokens (3 checks). Short-lived price moves are not listed as changes.
- — First check: $4.00 per 1M tokens Added to tracking later than most plans here; it joins month-to-month comparisons from its second month.
The source record lists $0.000004 per token ($4.00 per 1M tokens), fetched on Oct 18, 2026.
The source record, as published
"prompt":"0.000004"
Record history — 24 records for 9 questions
- Last record
- Shown in
- the United States
| Time | Value | Status |
|---|---|---|
| Oct 18, 2026 | $4.00 per 1M tokens | Observed |
| Oct 17, 2026 | $4.00 per 1M tokens | Observed |
| Oct 16, 2026 | $4.00 per 1M tokens | Observed |
| Time | Value | Status |
|---|---|---|
| Oct 18, 2026 | $20.00 per 1M tokens | Observed |
| Oct 17, 2026 | $20.00 per 1M tokens | Observed |
| Oct 16, 2026 | $20.00 per 1M tokens | Observed |
| Time | Value | Status |
|---|---|---|
| Oct 18, 2026 | $0.20 per 1M tokens | Observed |
| Oct 17, 2026 | $0.20 per 1M tokens | Observed |
| Time | Value | Status |
|---|---|---|
| Oct 18, 2026 | $8.00 per 1M tokens | Observed |
| Oct 17, 2026 | $8.00 per 1M tokens | Observed |
| Time | Value | Status |
|---|---|---|
| Oct 18, 2026 | $5.00 per 1M tokens | Observed |
| Oct 17, 2026 | $5.00 per 1M tokens | Observed |
| Time | Value | Status |
|---|---|---|
| Oct 18, 2026 | $4.00 per 1M tokens | Observed |
| Oct 17, 2026 | $4.00 per 1M tokens | Observed |
| Oct 16, 2026 | $4.00 per 1M tokens | Observed |
| Time | Value | Status |
|---|---|---|
| Oct 18, 2026 | $20.00 per 1M tokens | Observed |
| Oct 17, 2026 | $20.00 per 1M tokens | Observed |
| Oct 16, 2026 | $20.00 per 1M tokens | Observed |
| Time | Value | Status |
|---|---|---|
| Oct 18, 2026 | 1,000,000 tokens | Observed |
| Oct 17, 2026 | 1,000,000 tokens | Observed |
| Oct 16, 2026 | 1,000,000 tokens | Observed |
| Time | Value | Status |
|---|---|---|
| Oct 18, 2026 | 128,000 tokens | Observed |
| Oct 17, 2026 | 128,000 tokens | Observed |
| Oct 16, 2026 | 128,000 tokens | Observed |