Claude Opus 4.8
Anthropic · released May 27, 2026
- Type
- Proprietary
- Input
- $5.00
- Output
- $25.00
- Cached
- $0.50
List price · per 1M tokens · Anthropic at 1M context · source ↗
Our take
Written Aug 3, 2026Claude Opus 4.8 is Anthropic's flagship reasoning model that can handle up to one million tokens in a single request, with measured top-quartile scores across coding, hard prompts and instruction following. It is available only through hosted channels and sits at a premium price point with no budget tier.
Choose this for long-document analysis and synthesis at one-million-token scale, or for coding tasks where its measured peak score is strongest. It is also the sensible pick for enterprise procurement via Azure, Google Vertex or Amazon Bedrock if you already hold cloud contracts there. Skip it if cost is a primary constraint, if you need to run models on your own hardware, or if creative writing and mathematics are your main workloads.
The case for it
- Widest measured capability spread of any tracked model, with its strongest showing in coding.
- Exceptional context length for long-form work: up to one million tokens in a single request.
- Consistent top-tier performance across reasoning and instruction tasks.
- Broad enterprise availability, with nine offers across six providers including major cloud platforms.
The case against it
- Premium pricing with no budget tier; alternate tiers through some providers are even more expensive.
- Throughput varies significantly by provider, with a 25% spread from slowest to fastest measured.
- Creative writing and mathematics lag well behind its own peak performance in coding.
How good is it?
IntelligencePuzzles, maths, exam questions
Arena Text (overall)14th of 143 · 1474.6
Also on this board: 1483.6 via Thinking (Aug 2, 2026). Read the pair, not the higher one.
CodingWriting and fixing code on its own
Arena Coding7th of 143 · 1527.7
Also on this board: 1533.5 via Thinking (Aug 2, 2026). Read the pair, not the higher one.
AgenticPlanning, calling tools, staying on task
Arena Agent (IPS)14th of 36 · 0.033
Also on this board: 0.094 via Thinking (Jul 28, 2026). Read the pair, not the higher one.
WritingWe do not rate this
Two boards come close and neither tests writing: Arena Creative Writing asks people which of two replies they prefer, and LiveBench Language tests whether a model understood a passage. So we show where Claude Opus 4.8 placed and give it no mark out of five.
These tests check whether a model follows instructions — a precondition for all the work above, but not a measure of how well that work is done, which is why they get no rating.
Every published score for this model16 scoresEvery figure we hold, from 16 boards, with who ran it and a link to the source — including the boards no rating above is built on.
Or rent it from someone else
Why this differs from the header. The strip above quotes Anthropic's own list price. This is the cheapest live offer at the widest standard context we hold, whoever is serving it — a reseller undercutting a lab is ordinary commerce, not an error.
- per 1M tokens
- $5.00 in / $25.00 out
- Context served
- 1M
- Throughput
- Not measured
| Provider | In / out per 1M tokens | Context | Throughput | Trains on prompts | Logs prompts | Zero retention |
|---|---|---|---|---|---|---|
| Amazon Bedrock | $5.00 / $25.00 | 1M | 57 tok/s | No | No | Confirmed |
| OpenRouter | $5.00 / $25.00 | 1M | not measured | Unknown | Unknown | Unknown |
| Microsoft Azure AIus-east-2 | $5.00 / $25.00 | 1M | 67 tok/s | No | No | Unknown |
| Microsoft Azure AIglobal | $5.00 / $25.00 | 1M | 32 tok/s | No | No | Unknown |
| DeepInfra | $5.00 / $25.00 | 1M | not measured | Unknown | Unknown | Unknown |
| Google Vertex AIglobal | $5.00 / $25.00 | 1M | 63 tok/s | No | No | Confirmed |
| Anthropic | $5.00 / $25.00 | 1M128K out | 57 tok/s | No | Yes30 days | Unknown |
| Amazon Bedrockeu-west-1 | $5.50 / $27.50 | 1M | 69 tok/s | No | No | Confirmed |
| Google Vertex AIeurope | $5.50 / $27.50 | 1M | 59 tok/s | No | No | Confirmed |
Amazon Bedrock
Microsoft Azure AI
DeepInfra
Google Vertex AIAcross the 9 listings we hold: 7 say they do not train on prompts, 0 say they do and 2 do not say. 4 appear in the zero-retention registry we check; the rest are unknown to us rather than confirmed either way.
What each host's API supports
From the parameter list each endpoint publishes. Streaming is omitted: nothing we hold reports it, for any model.
- ✓
- Supported
- ✗
- Not supported
- Not published
- host gave no parameter list
| Provider | Tool calling | JSON output | Strict schema |
|---|---|---|---|
| Amazon Bedrock | ✓ | ✓ | ✓ |
| OpenRouter | ✓ | ✓ | ✓ |
| Microsoft Azure AIus-east-2 | ✓ | ✓ | ✓ |
| Microsoft Azure AIglobal | ✓ | ✓ | ✓ |
| DeepInfra | |||
| Google Vertex AIglobal | ✓ | ✓ | ✗ |
| Anthropic | ✓ | ✓ | ✓ |
| Amazon Bedrockeu-west-1 | ✓ | ✓ | ✓ |
| Google Vertex AIeurope | ✓ | ✓ | ✗ |
Tool calling: 8 of 9 listings say yes, 1 publishes no parameter list. JSON output: 8 of 9 listings say yes, 1 publishes no parameter list. Strict schema: 6 of 9 listings say yes, 2 say no, 1 publishes no parameter list.
Models people weigh against Claude Opus 4.8
When we formed this view
Dates behind this page
Prices last checked 9d ago
What we do not know about this model yet
- 1 of 9 listings publish no parameter list, so what their API accepts is unknown to us.
- Nothing we hold says whether an endpoint streams, so we do not show it either way.
- 2 of 9 listings do not say whether they train on prompts.
Licence and identifiers
What the licence allowsWe hold no licence record for this model. Inside are the identifiers you need to pull it — its Hugging Face repo where we have one, our slug and a machine-readable card.
Licence
Commercial API terms. We hold no licence record for this model, so there is nothing to summarise here.
Identifiers
- Modality record
- text+image+file->text
- Catalogue slug
- anthropic-claude-opus-4-8