Identity
- Status
- active
- Developer ID
claude-opus-4-8- Released
- May 28, 2026
- Version
- Claude Opus 4.8
- License
- Unknown
AnthropicClaude Opus 4.8
Claude Opus 4.8 is Anthropic's still-available legacy Opus model.
- Token context
- 1,000K tokens
- Inputs
- Text, Image
- Outputs
- Text
- Released
- May 28, 2026
Providers & Pricing
Estimate workload cost →| Provider | Input / 1M | Output / 1M | Cache read / 1M | Cache write / 1M | Observed | Evidence |
|---|---|---|---|---|---|---|
AnthropicAvailable | $5.00 | $25.00 | $0.50 | $6.25 | Sep 3, 2026 | Provider-reported |
 DeepinfraAvailable | $5.00 | $25.00 | — | — | Oct 19, 2026 | Provider-reported |
Benchmarks
All benchmark results →| ARC-AGI-1verified-v1-613c385b0c93 | 92.50 | — | — | Claude Opus 4.8 (Max)unknown | Original sourcewinner eligible | Third-party benchmark |
| ARC-AGI-2verified-v2-be40992860f9 | 72.08 | — | — | Claude Opus 4.8 (High)unknown | Original sourcewinner eligible | Third-party benchmark |
| LiveBench2026-06-25-90f8d44da965 | 81.18 | 24,171 | 1,270 | claude-opus-4-8-max-effortaverage per case | Recomputedwinner eligible | Third-party benchmark |
| LMArena Document Arenadocument-2026-09-13-a64ca3b12b6e | 1,474.79 | — | 11,551 | claude-opus-4-8-high; 95% CI [1467.88529316, 1481.69160653]; votes 11551; rank 12unknown | Original sourcewinner eligible | Third-party benchmark |
| LMArena Document Arenadocument-2026-09-13-a64ca3b12b6e | 1,464.07 | — | 12,128 | claude-opus-4-8; 95% CI [1457.10320334, 1471.03216030]; votes 12128; rank 19unknown | Original sourcewinner eligible | Third-party benchmark |
| LMArena Search Arenasearch-2026-10-13-a64ca3b12b6e | 1,204.11 | — | 106,304 | claude-opus-4-8; 95% CI [1198.48669076, 1209.73163091]; votes 106304; rank 19unknown | Original sourcewinner eligible | Third-party benchmark |
| LMArena Text Arenatext-2026-10-15-a64ca3b12b6e | 1,461.08 | — | 64,100 | claude-opus-4-8-high; 95% CI [1457.20719685, 1464.94408250]; votes 64100; rank 40unknown | Original sourcewinner eligible | Third-party benchmark |
| LMArena Text Arenatext-2026-10-15-a64ca3b12b6e | 1,453.90 | — | 65,172 | claude-opus-4-8; 95% CI [1450.05936004, 1457.74353427]; votes 65172; rank 47unknown | Original sourcewinner eligible | Third-party benchmark |
| LMArena Vision Arenavision-2026-10-09-a64ca3b12b6e | 1,294.18 | — | 18,341 | claude-opus-4-8-high; 95% CI [1287.71437228, 1300.65034925]; votes 18341; rank 24unknown | Original sourcewinner eligible | Third-party benchmark |
| LMArena Vision Arenavision-2026-10-09-a64ca3b12b6e | 1,288.52 | — | 18,852 | claude-opus-4-8; 95% CI [1282.01202676, 1295.03051235]; votes 18852; rank 29unknown | Original sourcewinner eligible | Third-party benchmark |
| ToneBench2026-10-17-10-task-e9c76358afb2 | 80.70 | 46,601 | 50 | Claude Opus 4.8 (max effort)average per case | Original sourcenot winner eligible | Third-party benchmark |
| ToneBench2026-10-17-10-task-e9c76358afb2 | 79.30 | 5,097 | 50 | Claude Opus 4.8 (high)average per case | Original sourcenot winner eligible | Third-party benchmark |
At a Glance
Model Facts
Capacity
- Token context
- 1,000K tokens
- Maximum output
- 128K tokens
- Total parameters
- Unknown
- Active parameters
- Unknown
- Knowledge cutoff
- Jan 1, 2026
Interface and Access
- Inputs
- Text, Image
- Outputs
- Text
- API available
- Yes
- Open weights
- No
- Self-hostable
- No
- Reasoning
- Yes
- Vision
- Yes
- Tool calling
- Yes
- Capabilities
- chat, generation, reasoning, tools
This page represents one developer model product. Dated API snapshots, serving endpoints, pricing, regions, quantizations, and service tiers attach as versioned aliases or provider details and never create duplicate public model records.
Version Lineage
PredecessorUnknown
SuccessorsUnknown
Aliasesclaude-opus-4-8
Explicit Unknowns
- Architecture
- Tokenizer
Primary Evidence
Sources and Observation Date
Comparable Peers
Related Model Comparisons
| A | Pair | B | Context |
|---|---|---|---|
Claude Opus 4.8Anthropic | vs |  GPT-5.6 TerraOpenAI | cross-developer peersimage, text |
Claude Opus 4.8Anthropic | vs | Claude Fable 5Anthropic | family variantsimage, text |
Claude Opus 4.8Anthropic | vs | Claude Haiku 4.5Anthropic | family variantsimage, text |
Claude Opus 4.8Anthropic | vs | Claude Opus 4.6Anthropic | family variantsimage, text |
Claude Opus 4.8Anthropic | vs | Claude Opus 5Anthropic | family variantsimage, text |
Claude Opus 4.8Anthropic | vs | GPT-4.1 MiniOpenAI | cross-developer peersimage, text |
Claude Opus 4.8Anthropic | vs | GPT-5.4OpenAI | cross-developer peersimage, text |
Claude Opus 4.8Anthropic | vs | GPT-5.6 LunaOpenAI | cross-developer peersimage, text |
Claude Opus 4.8Anthropic | vs | GPT-5.6 SolOpenAI | cross-developer peersimage, text |
Claude Opus 4.8Anthropic | vs |  Qwen3.7 FlashQwen | cross-developer peersimage, text |
Claude Opus 4.8Anthropic | vs | cross-developer peersimage, text | |
Claude Opus 4.8Anthropic | vs | Grok 4.3xAI | cross-developer peersimage, text |
Questions
Claude Opus 4.8 FAQs
What is Claude Opus 4.8?+
Claude Opus 4.8 is Anthropic's still-available legacy Opus model. It is developed by Anthropic and its current sourced lifecycle status is active.
What inputs and outputs does Claude Opus 4.8 support?+
Claude Opus 4.8's current record lists Text and Image as input and Text as output.
How much context does Claude Opus 4.8 support?+
The current record lists a 1,000K-token context window and a maximum output of 128K tokens.
Is Claude Opus 4.8 available through an API?+
Claude Opus 4.8 is marked as API-available. The directly sourced provider records currently include Anthropic and Deepinfra.
How much does Claude Opus 4.8 cost through an API?+
The lowest directly sourced prices currently attached to Claude Opus 4.8 are $5.00 per million input tokens through Anthropic and $25.00 per million output tokens through Anthropic. Prices are provider-specific and should be checked against each cited observation date.
What capabilities and tasks does Claude Opus 4.8 support?+
Claude Opus 4.8's recorded capabilities are chat, generation, reasoning, and tools. Its supported tasks are image and text.
Can Claude Opus 4.8 be self-hosted?+
Claude Opus 4.8 is not marked as an open-weight model. Self-hosting is marked as unsupported, with no license recorded.
Does Claude Opus 4.8 have related versions or aliases?+
No predecessor is recorded. No successor is recorded. Recorded aliases are claude-opus-4-8.
Which models can Claude Opus 4.8 be compared with?+
The current compatible peer set includes GPT-5.6 Terra, Claude Fable 5, Claude Haiku 4.5, Claude Opus 4.6, and Claude Opus 5. Compatibility requires shared sourced modalities and tasks; it does not imply that one model is better. Browse model comparisons →
How current is the Model Markets record for Claude Opus 4.8?+
Claude Opus 4.8 was last verified Aug 29, 2026 from Anthropic's primary source, “Claude Opus 4.8 | Claude Platform Docs.” The evidence is classified as official fact.