Claude Opus 4.6 - ByteSpike

Vendor: Anthropic Model ID: claude-opus-4-6 Capability: 200K context · tool use · vision · prompt caching · streaming · extended thinking Pricing: per-token, Opus tier (live rate) Opus 4.6 is the refinement step on 4.5 — tighter long-form prose and a measurable drop in hallucinations when summarising across many documents within its 200K context. It’s the right Opus for multi-document workflows that 4.5 was nearly good enough at: legal review, scientific literature synthesis, codebase audit reports. Opus 4.8 is the current flagship; 4.6 is kept available for teams who’ve validated against this specific version.

Request

curl https://llm.bytespike.ai/v1/messages \
  -H "x-api-key: $BYTESPIKE_API_KEY" \
  -H "anthropic-version: 2023-06-01" \
  -H "content-type: application/json" \
  -d '{
    "model": "claude-opus-4-6",
    "max_tokens": 16384,
    "messages": [
      {"role": "user", "content": "Synthesize the methodology sections of these 14 papers."}
    ]
  }'

Body parameters

Field	Type	Required	Default	Notes
`model`	string	yes	—	`claude-opus-4-6`
`messages`	array	yes	—	Conversation history. Up to 200K tokens of input.
`max_tokens`	integer	yes	—	Hard cap. Max for this model: 32768.
`system`	string \| array	no	—	Array form supports `cache_control`.
`temperature`	number	no	1.0	Range 0.0–1.0.
`top_p`	number	no	1.0	Nucleus sampling.
`tools`	array	no	—	Supported.
`tool_choice`	object	no	`{"type":"auto"}`	`auto` / `any` / `tool` (named).
`thinking`	object	no	—	Extended-thinking budget.
`stream`	boolean	no	false	SSE streaming.

Response

{
  "id": "msg_opus_…",
  "type": "message",
  "role": "assistant",
  "model": "claude-opus-4-6",
  "content": [
    {"type": "text", "text": "Across the 14 papers, three methodological themes emerge..."}
  ],
  "stop_reason": "end_turn",
  "usage": {
    "input_tokens": 187430,
    "output_tokens": 4218
  }
}

Code examples

curl https://llm.bytespike.ai/v1/messages \
  -H "x-api-key: $BYTESPIKE_API_KEY" \
  -H "anthropic-version: 2023-06-01" \
  -H "content-type: application/json" \
  -d '{
    "model": "claude-opus-4-6",
    "max_tokens": 16384,
    "messages": [{"role": "user", "content": "Synthesize the methodology sections of these papers."}]
  }'

Cache control

{
  "model": "claude-opus-4-6",
  "system": [
    {
      "type": "text",
      "text": "<the corpus you keep referring to>",
      "cache_control": {"type": "ephemeral"}
    }
  ],
  "messages": [...]
}

Cache rate at the discounted tier visible in the pricing table.

Errors

Code	Trigger	Billed?
400	Body validation failed	No
401	Missing / revoked key	No
402	Wallet exhausted	No
413	Input exceeds 200K tokens	No
429	Rate-limited	No
5xx	Upstream provider issue	No (auto-retry envelope)

When to use

Multi-document synthesis where 4.5 was almost-but-not-quite reliable.
Long-form summarisation that needs tight, non-repetitive prose.
For the current flagship Opus, see Opus 4.8.
For the prior Opus, see Opus 4.5.
For mid-tier cost / latency, see Sonnet 4.6.

Limits

Limit	Value
Context window	200K tokens
Max output	32768 tokens
Supports tool use	Yes
Supports vision	Yes
Supports streaming	Yes
Supports prompt caching	Yes
Supports extended thinking	Yes

​Request

​Body parameters

​Response

​Code examples

​Cache control

​Errors

​When to use

​Limits