Compare
R1 vs Gov Anthropic Claude Sonnet 4 5 20250929
This page is context-first: how much text each model can take in one request. Full specs adds capabilities and limits; the pricing matrix below is only about $/million tokens from hosts that list both models.
Model
Gov Anthropic Claude Sonnet 4 5 20250929
Context window
200K
200,000 tokens · ~150K words
Context window · side by side
Bar length is relative to the larger of the two windows (100% = max of this pair). This is not pricing.
Gov Anthropic Claude Sonnet 4 5 20250929 has about 1.6× the context window of the other in this pair.
Gov Anthropic Claude Sonnet 4 5 20250929 has 56% more context capacity (200K vs 128K tokens). R1 is 84% cheaper on input.
Quick verdicts
Short takeaways — validate with your own workloads.
Long document processing
Use Gov Anthropic Claude Sonnet 4 5 20250929. Its 200K context fits entire documents without chunking (vs 128K).
RAG / high-volume retrieval
Use R1. Input tokens are 84% cheaper — critical when sending large retrieved contexts.
Long output (reports, code files)
Use Gov Anthropic Claude Sonnet 4 5 20250929. Its 64K max output lets you generate complete artifacts in one request.
Full specs
Context, output, capabilities, and dates. Green highlights the favorable value where we compute a winner.
| Spec | R1 | Gov Anthropic Claude Sonnet 4 5 20250929 |
|---|---|---|
| Context window | 128,000 tokens (128K) | 200,000 tokens (200K) |
| Max output tokens | 8,192 tokens (8K) | 64,000 tokens (64K) |
| Speed tier | Deep | Balanced |
| Vision | No | Yes |
| Function calling | Yes | Yes |
| Extended thinking | Yes | Yes |
| Prompt caching | Yes | Yes |
| Batch API | No | Yes |
| Release date | Jan 2025 | N/A |
Pricing matrix
Dollar rates only: hosts that list both models, per 1M tokens. For how much text fits, use the context section above — not this table.
| Provider | R1 in | R1 out | Gov Anthropic Claude Sonnet 4 5 20250929 in | Gov Anthropic Claude Sonnet 4 5 20250929 out |
|---|---|---|---|---|
| Aws Bedrock | $1.35/M | $5.40/M | $3.60/M | $18.00/M |
| Azure | $1.35/M | $5.40/M | — | — |
| Deepinfra | $0.700/M | $2.40/M | — | — |
| Deepseek | $0.550/M | $2.19/M | — | — |
| Fireworks | $3.00/M | $8.00/M | — | — |
| Hyperbolic | $0.400/M | $0.400/M | — | — |
| Nebius | $0.800/M | $2.40/M | — | — |
| Novita | $0.700/M | $2.50/M | — | — |
| Openrouter | $0.700/M | $2.50/M | — | — |
| Replicate | $3.75/M | $10.00/M | — | — |
| Sambanova | $5.00/M | $7.00/M | — | — |
| Snowflake | $1.35/M | $5.40/M | — | — |
| Together Ai | $3.00/M | $7.00/M | — | — |
Frequently asked questions
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Example: a multi-turn chat session
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