Claude Opus 4.8 vs Grok 4.20 Multi Agent
At a Glance
| Compare | Claude Opus 4.8Anthropic | |
|---|---|---|
| Intelligence, Cost, and Efficiency | ||
| IntelligenceHigher is better · MM Intelligence v4.4 | UnrankedNot in the 57-model eligible cohort | #16 of 5764.3 score · 2/3 sources · provisional · missing LiveBench · full-core range 42.8–76.2 |
| Pricing and Limits | ||
| Input priceFrom · USD / 1M tokens | $5.00Anthropic ↗ · Sep 3, 2026 | $1.25Xai ↗ · Sep 3, 2026 |
| Output priceFrom · USD / 1M tokens | $25.00Anthropic ↗ · Sep 3, 2026 | $2.50Xai ↗ · Sep 3, 2026 |
| Context windowMaximum documented tokens | 1,000K | 1,000K |
| Model facts checked | Aug 29, 2026View model evidence → | Aug 29, 2026View model evidence → |
Token prices are the lowest available sourced USD rates; input and output may use different providers. Cost ranking estimates output spend on LiveBench, not a full request bill. Ranking methodology →
Available Benchmarks
| Benchmark | Claude Opus 4.8 | Grok 4.20 Multi-Agent |
|---|---|---|
| ARC-AGI-1verified-v1-613c385b0c93 · verified_score · leader | 92.50100% of row best · percent · Claude Opus 4.8 (Max) | 89.5097% of row best · percent · Grok 4.20 (Reasoning) |
| ARC-AGI-2verified-v2-be40992860f9 · verified_score · leader | 72.08100% of row best · percent · Claude Opus 4.8 (High) | 65.1490% of row best · percent · Grok 4.20 (Reasoning) |
| LMArena Search Arenasearch-2026-10-13-a64ca3b12b6e · arena_rating · statistical tie | 1,204.11100% of row best · rating · claude-opus-4-8; 95% CI [1198.48669076, 1209.73163091]; votes 106304; rank 19 | 1,204.80100% of row best · rating · grok-4.20-multi-agent-beta-0309; 95% CI [1199.36322528, 1210.23649279]; votes 126238; rank 18 |
| LMArena Text Arenatext-2026-10-15-a64ca3b12b6e · arena_rating · statistical tie | 1,453.90100% of row best · rating · claude-opus-4-8; 95% CI [1450.05936004, 1457.74353427]; votes 65172; rank 47 | 1,450.27100% of row best · rating · grok-4.20-multi-agent-beta-0309; 95% CI [1446.59423552, 1453.95404223]; votes 64946; rank 52 |
| LMArena Vision Arenavision-2026-10-09-a64ca3b12b6e · arena_rating · leader | 1,288.52100% of row best · rating · claude-opus-4-8; 95% CI [1282.01202676, 1295.03051235]; votes 18852; rank 29 | 1,258.9798% of row best · rating · grok-4.20-multi-agent-beta-0309; 95% CI [1252.84769478, 1265.09117861]; votes 24543; rank 57 |
| Overall ResultCounted from the protocol-matched rows above · 2 ties | 3 benchmark winsOverall lead | 0 benchmark wins |
Third-party benchmark Only like-for-like primary-publisher results are shown; raw scores, relative scores, configuration, and token spend remain visible.
Side-by-Side Facts
| Field | Claude Opus 4.8 | Grok 4.20 Multi-Agent |
|---|---|---|
| Developer | Anthropic | xAI |
| Family | Claude 4 8 | Grok 4 20 |
| Model | Claude Opus 4.8 | Grok 4.20 Multi-Agent |
| Version | Claude Opus 4.8 | Grok 4.20 Multi-Agent |
| Lifecycle | active | preview |
| Released | 2026-05-28 | Unknown |
| Knowledge cutoff | 2026-01-01 | Unknown |
| Input modalities | Text, Image | Text, Image |
| Output modalities | Text | Text |
| Context window | 1,000K | 1,000K |
| Total parameters | Unknown | Unknown |
| Active parameters | Unknown | Unknown |
| License | Unknown | Unknown |
| Open weights | No | No |
| API available | Yes | Yes |
| Self-hostable | No | No |
| Provider access | Anthropic (Standard), Deepinfra (Standard) | Xai (Standard) |
| Capabilities | chat, generation, reasoning, tools | generation, reasoning, research, tools |
Claude Opus 4.8 Capabilities
Grok 4.20 Multi Agent Capabilities
Related Comparisons
All image comparisons →| A | Pair | B | Context |
|---|---|---|---|
Claude Opus 4.8Anthropic | vs |  GPT-5.6 TerraOpenAI | cross-developer peersimage, text |
Claude Fable 5Anthropic | vs | Claude Opus 4.8Anthropic | family variantsimage, text |
Claude Haiku 4.5Anthropic | vs | Claude Opus 4.8Anthropic | family variantsimage, text |
Claude Opus 4.6Anthropic | vs | Claude Opus 4.8Anthropic | 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 | Grok 4.3xAI | cross-developer peersimage, text |
Primary Evidence
Sources and Freshness
Questions
Claude Opus 4.8 vs Grok 4.20 Multi Agent FAQs
Is Claude Opus 4.8 or Grok 4.20 Multi Agent better for coding?+
This comparison does not currently contain a protocol-matched coding benchmark for both Claude Opus 4.8 and Grok 4.20 Multi Agent, so Model Markets cannot name a coding leader from pricing, context size, or capability labels alone.
Which is cheaper, Claude Opus 4.8 or Grok 4.20 Multi Agent?+
Claude Opus 4.8 is $5.00 and Grok 4.20 Multi Agent is $1.25 per million tokens, so Grok 4.20 Multi Agent is cheaper on this metric. Claude Opus 4.8 is $25.00 and Grok 4.20 Multi Agent is $2.50 per million tokens, so Grok 4.20 Multi Agent is cheaper on this metric.
Which has a larger context window, Claude Opus 4.8 or Grok 4.20 Multi Agent?+
Both models have the same sourced context window: 1,000,000 tokens each.
Which performs better in benchmarks, Claude Opus 4.8 or Grok 4.20 Multi Agent?+
Claude Opus 4.8 leads the current overall benchmark count. The result uses 5 protocol-matched benchmarks from 2 publishers; it is not a universal quality score.
Can Claude Opus 4.8 or Grok 4.20 Multi Agent be self-hosted?+
Both models have the same sourced self-hosting status: unsupported. Claude Opus 4.8 is not marked open weight; Grok 4.20 Multi Agent is not marked open weight.
Can Claude Opus 4.8 and Grok 4.20 Multi Agent understand images?+
Claude Opus 4.8 is documented with image input; Grok 4.20 Multi Agent is documented with image input. This reflects supported input modalities, not vision quality.
Which can generate longer answers, Claude Opus 4.8 or Grok 4.20 Multi Agent?+
Claude Opus 4.8 has a sourced maximum output of 128,000 tokens; Grok 4.20 Multi Agent's maximum output is not reported. A larger limit cannot be determined.
Do Claude Opus 4.8 and Grok 4.20 Multi Agent support reasoning and tool use?+
Claude Opus 4.8: reasoning, tool calling, and image input. Grok 4.20 Multi Agent: reasoning, tool calling, and image input. Feature support does not establish relative quality.
Which is available from more inference providers, Claude Opus 4.8 or Grok 4.20 Multi Agent?+
Claude Opus 4.8 has 2 sourced provider routes; Grok 4.20 Multi Agent has 1, so Claude Opus 4.8 has broader tracked availability.
Which offers better value, Claude Opus 4.8 or Grok 4.20 Multi Agent?+
There is no universal value winner. Compare the input and output prices above with the matched benchmark result for your workload: cheaper tokens can be offset by different quality, token usage, latency, or provider availability.