Claude Opus 5.5 vs GPT-6 Astra: API price comparison (2026)
As of 2026-10-17, By blended price, Claude Opus 5.5 is cheaper — about 2.5× less. Claude Opus 5.5: $4 / $20 (Official (Intl)); GPT-6 Astra: $10 / $50 (Official (Intl)), per 1M input/output tokens.
 Claude Opus 5.5 |  GPT-6 Astra | |
|---|---|---|
| Blended | $8 | $20 |
| Cheapest channel | Official (Intl) | Official (Intl) |
| AA Intelligence | 57.6 | 52.7 |
| Context | 1M | 1.1M |
| China usability | ✗CN direct?Alipay·unverified?ID·unverified?Intl card·unverified Official (Intl) | ✗CN direct?Alipay·unverified?ID·unverified?Intl card·unverified Official (Intl) |
Claude Opus 5.5
| Channel | Blended | Input | Output | Cached | Access & payment (this channel) | Notes | Source |
|---|---|---|---|---|---|---|---|
| Official (Intl) $4 / $20 | $8 | $4 | $20 | $0.2 | ✗CN direct?Alipay·unverified?ID·unverified?Intl card·unverified conditions source2026-10-17 | Cache write $5/MTok; batch -50% | www.anthropic.com 2026-10-17 |
| OpenRouter $4 / $20 | $8 | $4 | $20 | $0.2 | ✗CN direct✓Alipay✗ID✗Intl card conditions source2026-10-17 | Original vendor endpoint: Anthropic Licensed cloud alternative: Amazon Bedrock $4 / $20 | openrouter.ai 2026-10-17 |
GPT-6 Astra
| Channel | Blended | Input | Output | Cached | Access & payment (this channel) | Notes | Source |
|---|---|---|---|---|---|---|---|
| Official (Intl) $10 / $50 | $20 | $10 | $50 | $1 | ✗CN direct?Alipay·unverified?ID·unverified?Intl card·unverified conditions source2026-10-17 | Standard tier, short context. Long context: in $20.00 / out $75.00 models.dev ✓ | platform.openai.com 2026-10-17 |
| OpenRouter $10 / $50 | $20 | $10 | $50 | $1 | ✗CN direct✓Alipay✗ID✗Intl card conditions source2026-10-17 | Original vendor endpoint: OpenAI Licensed cloud alternative: Azure $10 / $50 | openrouter.ai 2026-10-17 |
Claude hub · GPT (OpenAI) hub ·
FAQ
Which is cheaper, Claude Opus 5.5 or GPT-6 Astra?
As of 2026-10-17, By blended price, Claude Opus 5.5 is cheaper — about 2.5× less. Claude Opus 5.5: $4 / $20 (Official (Intl)); GPT-6 Astra: $10 / $50 (Official (Intl)), per 1M input/output tokens.
What are the context windows of Claude Opus 5.5 and GPT-6 Astra?
Claude Opus 5.5: 1M; GPT-6 Astra: 1.1M.
Can I use Claude Opus 5.5 and GPT-6 Astra directly from mainland China?
Claude Opus 5.5（Official (Intl)）direct no, Alipay unverified; GPT-6 Astra（Official (Intl)）direct no, Alipay unverified. Via each cheapest channel.
Which is stronger, Claude Opus 5.5 or GPT-6 Astra?
Artificial Analysis Intelligence Index (via OpenRouter rankings, 2026-10-17): Claude Opus 5.5 57.6, GPT-6 Astra 52.7.
How much can I save switching between them?
Blended (0.75×in+0.25×out): Claude Opus 5.5 $8 vs GPT-6 Astra $20, a difference of $12 per 1M tokens.